Histograms Flashcards Preview

AQA Core Maths > Histograms > Flashcards

Flashcards in Histograms Deck (17)
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1

What is the Formula for Frequency Density?

Frequency Density = Frequency ÷ Group width

2

Group width is the...

Width of the bars

3

Frequency (from bar area) =

Area of bar = Base x height = Frequency

4

% =

(Frequency ÷ Total number of people surveyed) x 100

5

Mean (graphs) =

Data x frequency

6

If you get a median of 0.5, you...

Round up to the next position

7

When deciding if the mean, median, or mode is most suitable, ask...

Is it affected by extreme values?

8

Why is data used?

To inform decisions

9

Why is data used?

To inform decisions

10

What are the 2 types of data?

Qualitative and Quantitative

11

2 types of Quantitative data?

Discrete (whole numbers)
e. g. number of siblings

Continuous (decimals)
e.g. weight

12

Box plot info is....

Mininimum
LQ
Median
UQ
Maximum

13

LQ =

1/4 (n+1)th term

14

UQ =

3/4 (n+1)th tern

15

Median (Quartile formula) =

2/4 (n+1)th term

16

Median, LQ, and UQ are found by....

Cumulative frequency (y-axis)

17

The minimum & maximum values are where the Cumulative Frequency....

Begins & Ends