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‼️Maths‼️ > Maths > Flashcards

Maths Flashcards

1
Q

How do you calculate the area of a rectangle?

A

Length x width

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2
Q

How do you calculate the area of a parallelogram?

A

Base x height

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3
Q

How do you calculate area of a trapezium?

A

1/2 (a+b)h

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4
Q

How do you calculate area of a triangle?

A

1/2 x base x height

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5
Q

How do you calculate the circumference of a circle?

A

pi x diameter

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6
Q

How do you calculate circumference of a circle?

A

2 x pi x radius

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7
Q

How do you calculate the area of a circle?

A

Pi x radius^2

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8
Q

How do you calculate the volume of a cuboid?

A

Length x width x height

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9
Q

How do you calculate the volume of a prism?

A

area of cross section x length

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10
Q

How do you calculate the volume of a cylinder?

A

pi x radius^2 x height

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11
Q

How do you calculate the volume of a pyramid?

A

1/3 x area of base x height

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12
Q

What’s the general quadratic equation?

A

ax^2 + bx + c = 0

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13
Q

Whats the quadratic formula

A

x = −b± b^2−4ac
➗
2a
​

​​
​​

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14
Q

How do you calculate speed?

A

Speed = distance ➗ time

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15
Q

How do you calculate density?

A

Density = mass ➗ volume

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16
Q

How do you calculate pressure?

A

Pressure = force ➗ area

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17
Q

How do you calculate the hypotenuse in Pythagoras’ theorem?

A

A^2 + b^2 = c^2

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18
Q

What’s the mneumonic for trigonometry?

A

SohCahToa

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19
Q

How do you calculate sine?

A

SOH

Sine = opposite ➗hypotenuse

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20
Q

How do you calculate consine?

A

CAH

Cos = Adjacent ➗ hypotenuse

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21
Q

How do you calculate tangent?

A

TOA

Tan = opposite ➗adjacent

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22
Q

If you’re finding a side length what do you tick from sohcahtoa?

A

The thing you know and the thing you want to know

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23
Q

If you’re finding an angle in sohcahtoa what do you tick?

A

The two things you know

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24
Q

How do you change the decimal number to angle size in trigonometry?

A

Use the inverse sin, tan or cos button

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25
Q

What is the modal class?

A

The class with the highest frequency

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26
Q

How do you calculate the median class?

A 
N+1 ➗ 2  = class position
Median is value in that position
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27
Q

How do you estimate the mean in a grouped frequency chart?

A

Sum of fx ➗ sum of frequency

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28
Q

What does the range show?

A

How spread out the data is

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29
Q

How do you work out the position of the lower quartile?

A

N+1➗4

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30
Q

How do you work out the position of the upper quartile

A

3(n+1) ➗ 4

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31
Q

How do you calculate the inter quartile range?

A

Upper quartile - lower quartile

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32
Q

What the plan view?

A

View from above

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33
Q

What’s the side elevation?

A

View from the side

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34
Q

What’s the front elevation?

A

View from the front

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35
Q

What is the formula linking the number of faces, edges and vertices of a polyhedron?

A

Vertices + faces - edges = 2

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36
Q

How do you calculate the total surface area of a cylinder?

A

2 x pi x r x h + 2 x pi x r^2

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37
Q

How do you calculate the curved surface area of a cone?

A

Pi x radius x slant height

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38
Q

How do you calculate the surface area of a sphere?

A

4 x pi x radius^2

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39
Q

How do you calculate volume of a cone?

A

1/3 x pi x radius^2 x perpendicular height

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40
Q

How do you calculate the volume of a sphere?

A

4/3 x pi x radius^3

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41
Q

What does the gradient on a distance time graph show?

A

Represents speed

Gradient = distance ➗ time

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42
Q

What is a stationary object represented as on a distance time graph?

A

A horizontal line

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43
Q

What does the gradient on a velocity time graph show?

A

Acceleration

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44
Q

What does a horizontal line represent on a velocity time graph?

A

A constant speed

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45
Q

In a velocity time graph, how is acceleration calculated?

A

By the gradient. Velocity ➗ time

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46
Q

How do you calculate gradient on straight line graphs?

A 
Gradient = change in y coordinate ➗ change in x coordinate 
Gradient = m
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47
Q

How many factors does a prime number have?

A

2

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48
Q

What does bidmas stand for?

A

Brackets, indices, division, multiplication, addition, subtraction

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49
Q

What is the least common multiple?

A

The smallest number that will divide by all the numbers in the question. Multiply all the factors of each number to get LCM. or list al the multiples and the LCM is the smallest one

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50
Q

What’s the Highest common factor?

A

The biggest number that will divide into all the numbers in the question. Multiply all the prime factors that appear in both numbers together to get HCF or list and the HCF is the biggest factor

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51
Q

How do you calculate a fraction into a decimal?

A

Divide numerator by the denominator

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52
Q

How do you calculate a decimal as a percentage?

A

X 100

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53
Q

In multiplication what do you do with the powers?

A

Add them

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54
Q

In division what do you do with the powers?

A

Subtract them

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55
Q

In a distance time graph, the steeper the graph…?

A

The faster the object is moving

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56
Q

In a distance time graph, if the gradients negative…?

A

The object is coming back

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57
Q

In a velocity time graph the area under the graph is?

A

The distance travelled

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58
Q

A negative slope of a velocity time graph shows?

A

Deceleration

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59
Q

How do you calculate percentage change?

A

Change ➗original X 100

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60
Q

What do angles In a triangle add up to?

A

180 degrees

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61
Q

What do angles on a straight line add up to?

A

180 degrees

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62
Q

What do angles in a quadrilateral add up to?

A

360 degrees

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63
Q

What do angles around a point add up to?

A

360 degrees

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64
Q

What are alternate angles?

A

Alternate angles are the same. They’re found in a z shape

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65
Q

What are allied angles?

A

Allied angles add up to 180 degrees. They’re found in a C or U shape

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66
Q

What are corresponding angles?

A

Corresponding angles are the same. They’re found in an F shape

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67
Q

What’s the sum of exterior angles?

A

360 degrees. Exterior angle = 360 ➗ n

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68
Q

What’s the sum of interior angles?

A

(N-2) x 180 degrees or 180 - exterior angle

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69
Q

What’s an isosceles Triangle?

A

2 sides the same, 2 angles the same, 1 line of symmetry

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70
Q

What’s a scalene triangle?

A

All three sides different, all three angles different, no symmetry

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71
Q

What’s an equilateral triangle?

A

3 equal sides, 3 equal angles, 3 lines of symmetry

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72
Q

What’s a right angled triangled?

A

1 right angle (90 degrees) , no lines of symmetry

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73
Q

What does SSS stand for when proving triangles are congruent?

A

Three sides are the same

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74
Q

What does AAS stand for when proving triangles are congruent?

A

Two angles and a corresponding side match up

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75
Q

What does SAS stand for when proving triangles are congruent?

A

Two sides and the angle between them match up

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76
Q

What does RHS stand for when proving triangles are congruent?

A

A right angle, the hypotenuse and one other side all match up

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77
Q

When are shapes similar?

A

if they have The same angles, all three sides are proportional any two sides are proportional and the angle between them is the same

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78
Q

What’s a translation?

A

Movement of the shape. Given as a vector - written x over y. Shapes are congruent under translation

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79
Q

What is rotation?

A 
To describe rotation
- angle of rotation 
- direction of rotation
- centre of rotation
Shapes are congruent under rotation
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80
Q

What are reflections?

A

For a reflection you must give the equation of the mirror line. Shapes are congruent under reflection

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81
Q

What is enlargement?

A

For enlargement you must specify

  • the scale factor
  • the centre of enlargement
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82
Q

What’s the scale factor?

A

If the scale factor is bigger than 1 the shape gets bigger. If the scare factor is smaller than 1 it gets smaller. If the scale factor is negative then the shape pops out he other side of the enlargement centre

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83
Q

How do you calculate the area of a sector?

A

Area of sector = x(angle) ➗ 360 X area of full circle

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84
Q

How do you calculate the length of the arc?

A

X(angle) ➗360 X circumference of full circle

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85
Q

What are probabilities?

A

A probability at 0 means something will never happen. A probability of one means it definitely will.

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86
Q

How do you calculate probability?

A

Probability = number of ways for something to happen ➗ total number of possible outcomes

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87
Q

What do probabilities always add up to?

A

1

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88
Q

How do you calculate relative frequency in probability experiments?

A

Relative frequency = frequency ➗ number of times you tried the experiment

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89
Q

The more times you do the experiment…?

A

The more accurate your estimate of the probability

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90
Q

How do you calculate expected frequency of a result?

A

Probability x number of trials

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91
Q

In histogram, how do you calculate frequency?

A 
Frequency = frequency density X class width 
Frequency is area of the bar
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92
Q

How do you calculate Standard form?

A

A x 10^n Where A is a number between 1 and 10 and N is the number of places the decimal point would move if you wrote the number out in decimal form

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93
Q

What is Pythagorus’ Theorem?

A

a^2 + b^2 = c^2

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94
Q

What is Sine?

A

Sine = opposite / hypotenuse

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95
Q

What is Cosine?

A

Cosine = adjacent / hypotenuse

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96
Q

What is Tangent?

A

Tangent = opposite / adjacent

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97
Q

When do you use SOHCAHTOA?

A

if you have a right angled triangle

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98
Q

To find a side in sohcahtoa what do you do?

A

Tick the thing you know and the thing you want to know

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99
Q

To find an angle in sohcahtoa what do you do?

A

Tick the two things you know. Use INVERSE

100
Q

When do you use the cosine rule?

A

You can only use it to find a side length if you know 2 side lengths and the angle enclosed between them

101
Q

What is the cosine rule for a side length?

A

a^2 = b^2+c^2-2bcCosA

Must square root answer

102
Q

How can you use the cosine rule for an angle?

A

If we know all three side lengths you can use it to find any angle

103
Q

What is the cosine rule to an angle?

A

Cos A = (b^2+c^2-a^2) / 2bc

104
Q

When can you use the sine rule?

A

If you know 2 sides and the angle opposite one of them

105
Q

What is the sine rule for finding a side?

A

a/sinA = b/SinB = c/SinC

106
Q

What is the sine rule for finding an angle?

A

SinA/a = SinB/b = SinC/c

107
Q

How do you work out the area of a triangle?

A

1/2 abSinC

108
Q

How do you work out the upper and lower bounds?

A

Half the ‘to the nearest’ value and add that on or take it away

109
Q

What does anything to the power of 0 equal?

A

1

110
Q

What does anything to the power of 1/2 equal?

A

The square root of the number

111
Q

What does anything to the power of 1/3 equal?

A

The cube root of the number

112
Q

How do you rationalise the denominator with surds?

A

Multiple the top and bottom by the surd. The new equation will have the surd on top.

113
Q

How do you find the nth term of a linear equation?

A

Find the common difference and then add or subtract the difference from the term

114
Q

How do you find the nth term of a quadratic equation?

A

Work out the difference between the differences. Divide this value by 2. Subtract the n^2 term from the sequence. Find the rule and add this on to the n^2 term

115
Q

What is the fibonnachi sequence?

A

When you add the values in the sequence to get the next value

116
Q

In function, what do you do first?

A

The function closest the the bracket

117
Q

Whats the equation for direct proportion?

A

A = K x B

118
Q

Whats the equation for inverse proportion?

A

A = k/b

119
Q

How do you calculate density?

A

Density = mass / volume

120
Q

What is front elevation?

A

The view from directly in front of something

121
Q

What is plan view?

A

The view from above

122
Q

What is side elevation?

A

The view from the side

123
Q

What’s an integer?

A

A whole number

124
Q

What’s a multiple of a number?

A

Its timetables

125
Q

What’s a factor of a number?

A

the numbers that divide into it

126
Q

What’s a prime number?

A

A number which doesn’t divide by anything apart from itself and 1.

127
Q

What are the prime numbers?

A

2,3,5,7,11,13,17,19,23,29,31,37,41,43..

128
Q

How do you write the numbers of prime factorisation from a factor tree?

A

You simplify them and multiply them

129
Q

How do you divide fractions?

A

Flip the second & then multiply

130
Q

How do you add and subtract fractions?

A

Make sure the denominators are the same and then add or subtract

131
Q

How do you find a fraction of something?

A

Multiply the something by the numerator and then divide by the denominator

132
Q

How do you write an expression as a fraction?

A

Write the first number over the second and then simplify

133
Q

How do you convert recurring decimals into fractions?

A

Name your decimal, multiply it by a power of ten to move it past the decimal point. Then subtract the original decimal. Divide it and cancel.

134
Q

How do you convert fractions into recurring decimals?

A

Find an equivalent fraction with all nines on the bottom. The numerator will tell you the recurring part.

135
Q

How do you leave a number in significant figures?

A

The 1st significant figure is the first number which isn’t zero. The 2nd,3rd… follow on after the 1st. After rounding the last digit, end zeros must be filled in.

136
Q

How do you estimate square roots?

A

Find two square numbers, one either side of the number you’re given. Decide which number it is closest to and make an estimate of the digit after the decimal point.

137
Q

When using bounds how do you calculate the maximum and minimum value? (multiplication)

A

Find the minimum value by multiplying the lower bounds.

Find the maximum value by multiplying the upper bounds.

138
Q

When using bounds how do you calculate the maximum and minimum value? (division)

A 
Maximum = maximum bound / minimum bound
Minimum = minimum bound / maximum bound
139
Q

How do you multiple and divide standard from?

A

Multiply/divide the front numbers and powers separately. Then convert back to standard form.

140
Q

How do you add and subtract with standard from?

A

Make sure the powers of 10 are the same. Add or subtract the front numbers. Convert your answer to standard from.

141
Q

What’s 1 to any power?

A

1

142
Q

What’s the rule in terms of powers and fractions?

A

Apply the power to both the top and bottom of a fraction

143
Q

What do you do with a negative power?

A

Turn the fraction the other way up and make the power positive.

144
Q

How do you do two-stage fractional powers?

A

Split the fraction into a root and a power. Then work out the root and then power.

145
Q

How do you multiply double brackets?

A

First, Outside, inside, last and then simplify

146
Q

How do you multiply triple brackets?

A

Multiply two together then multiply the result by the remaining bracket.

147
Q

How do you factorise?

A

Take out the biggest number that goes into all the terms. The bit at the front of the bracket is the common factor, the bits inside are what’s needed to get back to the original terms if you multiply the bracket out.

148
Q

What is DOTS?

A

The difference of two squares.

149
Q

When do you use DOTS?

A

When you have one thing squared - another thing squared

150
Q

Whats the rule for DOTS?

A

a^2 + b^2 = (a+b) (a-b)

151
Q

How can you use DOTS if one of the numbers isn’t a squared number?

A

You write is as (root number)^2

152
Q

How do you rationalise a denominator?

A

You multiply the equation by a surd on top and bottom. the answer will leave you with a surd on top but not on bottom.

153
Q

If a question asks to write your answer in the form of a root 3, what do you do?

A

Write each surd in terms of root 3. Then do the sum, leaving your answer in terms of root 3.

154
Q

How do you rearrange an equal so that you have x = a number?

A

Rearrange the equation so that you have all the x’s on one side and the numbers on the other. Then divide both sides by the number multiplying x to find the value of x.

155
Q

How do you get rid of fractions?

A

Multiply every term of the equation by whatever;s on the bottom of the fraction.

156
Q

How do you make a letter the subject of the equation if it’s in a fraction?

A

Get rid of any fractions. Collect all the subject terms on one side and all the non-subject terms on the other. Then divide by the number to give you “the subject =” equation,

157
Q

How do you make a letter the subject of the equation if it involves a square number?

A

Collect all the subject terms on one side and the non-subject terms in the other. Square root both sides to give you your answer

158
Q

How do you make a letter the subject of the equation if it involves a square root?

A

Get rid of any square roots by squaring both sides and then collect the subject terms on one side

159
Q

How do you make a letter the subject of the equation if it appears twice?

A

Get rid of any fraction. Multiply out any brackets. Collect all the subject terms on one side. Combine like terms on one side of the equation and then divide both side by the bracket

160
Q

How do you factorise a quadratic when a = 1?

A

Write down the two brackets (x ) (x ) = 0 Then find two numbers that multiple to give c but add/ subtract to give b. Fill in the +/- gaps. Solve the equation by setting each bracket to equal 0.

161
Q

How do you factorise a quadratic when a isn’t 1?

A

Write out the initial brackets with (number x ) (x ) = 0. Then find pairs of numbers that multiply to give c. Then try out the numbers in combinations to see which pair adds/subtracts to give you b. Then fill in the +/- signs so that they add/subtract to give b. Check by expanding the brackets, Then solve the equation so the brackets = 0.

162
Q

How do you complete the square?

A

Rearrange the quadratic into the standard format. Write out the initial bracket. Multiply out the brackets and compare to the original. Add or subtract the adjusting number to make it match the original.

163
Q

How do you add or subtract algebraic fractions?

A

Work out the common denominator. Multiply top and bottom of each fraction by whatever gives you the common denominator. Add or subtract the numerators.

164
Q

How can you use a sequence to find out the value of two consecutive terms, if you’re given the sum of them and the expression of the sequence.

A

Call the two terms n and n + 1. Fit them into the expression and work out the sum of them. This equals to the sum you’ve been given, so solve the equation to work out n. Then use the expression and the value of n to work out the values.

165
Q

What do you do with the inequality sign during multiplication and division by a negative number?

A

Flip it.

166
Q

How do you show inequalities on a graph?

A

Convert each inequality to an equation. Draw the graph for each equation. Work out which side of each line you want and shade the region this gives you

167
Q

How do find the solution to an equation using iterations if you’re told which numbers it lies between?

A

Try the values of x with 1d.p that lie between the given values. If there’s a sign change then try values with 2d.p. Where there is a sign change is where the solution lies. If they answer round to the same number, that is the answer.

168
Q

How do find the solution to an equation using iterations if you’re told what x of 0 equals?

A

Use the starting value by putting it into the equation. Then use the answer to 1 d.p as x n+1. Keep pressing equals and stop when they round to the same number

169
Q

How can any even number be written?

A

2n

170
Q

How can any odd number be written?

A

2n+1

171
Q

How can consecutive numbers be written?

A

n, n+1, n+2..

172
Q

Whats the inverse function?

A

The reverse of the function

173
Q

What is y=x?

A

The main diagonal through the origin

174
Q

What are other sloping lines through the origin represented as?

A

y= ax

175
Q

What letter represents the gradient y=mx+c?

A

m

176
Q

What letter represents the y intercept y=mx+c?

A

c

177
Q

How do you find the equation of a straight line?

A

Find the gradient, m and find the point that the line crosses the y axis, c. Put them into the equation.

178
Q

How do you find the equation of a line through two points?

A

Use the two points to find the gradient, m. Substitute one of the points into the equation you’ve found. Rearrange the equation to find c. Substitute back into y = mx + c

179
Q

What method can you use when drawing straight line graphs?

A

Table of 3 values - this will give you some of the coordinates.

180
Q

What are the gradients like for parallel lines?

A

the same

181
Q

What do perpendicular gradients add up to?

A

-1

182
Q

Whats a sin graph like?

A
  • repeat every 360 degrees
  • bounces between y limits of +1 and -1
  • starts at -360, 0
183
Q

Whats a cos graph like?

A
  • repeats every 360 degrees
  • bounces between y limits of +1 and -1
  • starts at -360,1
184
Q

Whats a tan graph like?

A
  • repeats every 180 degrees

- tan x goes from - infinity to + infinity

185
Q

How can you use the sin graph to solve equations?

A

draw a line at the given sin x = ….

Then read off where it crosses sin x. Take this number away from 180 to give the second solution

186
Q

What does f(x+2) mean?

A

Move 2 left

187
Q

What does f(x-2) mean?

A

Move 2 right

188
Q

What does f(x/2)?

A

Stretch scale factor of 2

189
Q

What does f(2x) mean?

A

Stretch scale factor of 1/2

190
Q

What does f(-x) mean?

A

Reflection in the x axis

191
Q

What does f(x) + 2 mean?

A

Move 2 up

192
Q

What does f(x) - 5 mean?

A

Move 5 down

193
Q

What does 2f(x) mean?

A

Multiply by 2

194
Q

What does 1/2f(x) mean?

A

Divide by 2

195
Q

Who do numbers outside the bracket belong to?

A

The y axis and y co-ordinates up and down

196
Q

Who do numbers inside the bracket belong to?

A

The x axis and x co-ordinates left and right (they do the opposite)

197
Q

How do you simplify ratios if they’re decimals?

A

Multiply by sides by 10 and then divide to reduce the ratio to the simplest form.

198
Q

How do you simplify ratios if they have different measurements?

A

Convert to the same measurements. Simplify the ratio. Remove the measurement in the answer

199
Q

How do you do proportional division with ratios?

A

Add up the ratios. Divide the total by the sum of the ratios to find out 1 part. Multiply this by whatever number is in the ratio for each person/object.

200
Q

How do you solve an equation with changing ratios?

A

Write the ratios as equations then turn the ratios into fractions. Solve the two equations simultaneously.

201
Q

Whats the rule for direct proportion questions?

A

Divide for one, then times for all

202
Q

Whats the rule for inverse proportion questions?

A

Times for one, then divide for all

203
Q

Whats the multiplier like for a percentage increase and decrease?

A

For a % increases, the multiplier is greater than 1.

For a & decrease, the multiplier is less than 1

204
Q

How do you express x as a percentage of y?

A

Divide x by y, then multiply by 100

205
Q

How do you find the original value?

A

Write the amount in the question as a percentage of the original value. Divide to find 1% of the original value. Multiply by 100 to give the original price.

206
Q

What are vertically opposite angles?

A

Two angles opposite each other on a parallel line. The are the same

207
Q

What’s a square?

A

4 angles of 90 degrees. 4 lines of symmetry.

208
Q

What’s a rectangle?

A

4 equal angles of 90 degrees, 2 lines of symmetry

209
Q

What’s a rhombus?

A

4 equal sides, 2 pairs of equal angles (opposites), neighbouring angles + to 180. 2 lines of symmetry

210
Q

What’s a parallelogram?

A

2 pairs of equal sides. 2 pairs of equal angles. opposite angles equal, neighbouring angles + to 180. no symmetry

211
Q

What’s a trapezium?

A

1 pair of parallel sides. No symmetry

212
Q

What’s a kite?

A

2 pairs of equal sides, 2 pairs of equal angles (opposites) neighbouring angles + to 180. no lines of symmetry.

213
Q

Whats the circle theorem referring to a tangent and a radius?

A

A tangent and a radius meet at 90 degrees

214
Q

Whats the circle theorem referring to two radii?

A

Two radii form an isosceles triangle

215
Q

Whats the circle theorem referring to a perpendicular bisector of a chord?

A

The perpendicular bisector of a chord passes through the centre of the circle.

216
Q

Whats the circle theorem referring to the angle at the centre of the circle?

A

The angle at the centre of a circle is twice the angle at the circumference

217
Q

Whats the circle theorem referring to angles in a semicircle?

A

The angle in a semicircle is 90 degrees

218
Q

Whats the circle theorem referring to angles in the same segment?

A

Angles in the same segment are equal. All triangles drawn from a chord will have the same angle where they touch the circumference. The two angles on opposite sides of the chord + to 180.

219
Q

Whats the circle theorem referring to opposite angles in a cyclic quadrilateral?

A

Opposite angles in a cyclic quadrilateral add up to 180 degrees if subtended by the same arc.

220
Q

Whats the circle theorem referring to tangents from the same point?

A

Tangents from the same point are the same length. They create two congruent right-angled triangles.

221
Q

Whats the circle theorem referring to the alternate segment theory?.

A

The angle between a tangent and a chord is always equal to the angle in the opposite segment.

222
Q

How can you find the area of a segment?

A

Find the area of the triangle, then subtract it from the sector’s area. (use 1/2 r^2sin x for the area of the triangle

223
Q

How do you work out the volume of a frustum?

A

volume of original cone - volume of removed cone

224
Q

What happens to the sides if a shade is enlarged?

A

Scale factor n = n times bigger

225
Q

What happens to the areas if a shade is enlarged?

A

scale factor = n = n^2 times bigger

226
Q

What happens to the volumes if a shade in enlarged

A

scale factor = n = n^3 times bigger

227
Q

What is locus?

A

A line or region that shows all the points which fit a given rule

228
Q

What are the important words with bearings?

A 
From (where you start)
North Line ( at the point you're going from draw a north line)
Clockwise (draw in the angle clockwise from the north line to the line joining the two points)
229
Q

What is sin 30,45,60?

A

30 = 1/2 45 = 1/ root 2 60 = root 3/2

230
Q

What os cps 30,45,60?

A

30 = root 3/2 45= 1/root 2 60= 1/2

231
Q

What is tan 30,45,60?

A

30= 1/root 3 45= 1 60= root 3

232
Q

What is sin 0, 90?

A

0 = 0 90 =1

233
Q

What is cos 0,90?

A

Cos 0 = 1

Cos 90 = 0

234
Q

What is tan 0?

A

0

235
Q

What is 3d pythagorus for cuboids?

A

a^2 + b^2 +c^2 =d^2

236
Q

What do you need to remember to do with vectors?

A

underline them , use the arrow

237
Q

What does and mean in probability?

A

Times

238
Q

What does or mean in probability?

A

Add

239
Q

What is quantitative data?

A

Numerical

240
Q

What is discrete data?

A

Limited values

241
Q

What is continuous data?

A

Unlimited values

242
Q

What is qualitative data?

A

non numerical

243
Q

On a frequency table what is the mode?

A

The category with the most entries

244
Q

On a frequency table what is the range?

A

highest from first column - lowest from first column

245
Q

On a frequency table what is the median?

A

The category with the middle value

246
Q

On a frequency table what is the mean?

A

make new column, x X frequency. Total of this column/ total of second column

‼️Maths‼️ (1 decks)

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