Data analysis aspect

Question 1

What 4 things to be aware of?

Answer 1

1. Gradients (Also expected in experimental)
2. Uncertainty (“ likewise)
3. Intercept (Link to gradients)
4. Questions on different types of conducted experiments

Question 2

How do we actually gain the gradient?
(2-way)

Answer 2

(y₁ - y₂)/x₁ - x₂

• Choose a spot rlly high, and one rlly low
• Then ye.

Question 3

What’s the 1 most important thing we need in order to create max/min gradient lines?

Answer 3

Error bars.

Question 4

How to form max gradient line?
(Steepest)
(2 steps)

Answer 4

1. From error boxes:
   lowest value = bottom right
   highest value = top left
2. Draw the line

Question 5

How to form min gradient line?
(Flattest)
(2 steps)

Answer 5

1. From error boxes:
   lowest value = top left
   highest value = bottom right
2. Draw the line

Question 6

THEN, how do we get the max/min gradient value from their lines within graph?

Answer 6

(y₁ - y₂)/x₁ - x₂

lol.

Question 7

So, how do we gain the mean gradient?

Answer 7

(max gradient + min gradient)/2

Question 8

and then to gain absolute uncertainty of the gradients?

Answer 8

(max gradient - min gradient)/2

Question 9

HENCE, how to get the percentage uncertainty of the gradients?

Answer 9

(absolute uncertainty/mean gradient) x 100

Question 10

How do we usually get the uncertainty?
(2 ways, 1 faker?!?!)

Answer 10

1. Resolution (smallest measurement value u can get)
2. (Range x mean)/2 <— that’s absolute
3. Provided uncertainties + mixed into an eqn

Question 11

Elaborate on “provided uncertainties + mixed into an eqn” for getting uncertainty?
(2-way + FORMULA + 2-way)

Answer 11

• You have to add the uncertainties of the eqn
• to gain the % uncertainty
• (resolution/value + etc.)
• If any value is ?ⁿ
• x by ‘n’ of that particular uncertainty

Question 12

2 ways of gaining % uncertainty?

Answer 12

1. “Provided uncertainties + mixed into an eqn”
2. (Absolute/mean gradient OR “mean value”) x 100

Question 13

2 ways gaining absolute uncertainty?

Answer 13

1. Possibly from “eqn” - value x % uncertainty
2. (max-min)/2 (I have also stated this before O_o

Question 14

How to gain intercept?
(4 things)

Answer 14

2 types:
- y-intercept (when x = 0)
- x-intercept (when y = 0)

• Although so far it’s been y-intercept
• Otherwise, it’s when we extrapolate the graph

Question 15

How to gain mean intercept or absolute uncertainty & % uncertainty of intercepts?
(3 things)

Answer 15

• Likewise brother: (max intercept + min intercept)/2 = mean intercept
• Absolute uncertainty = (max intercept - min intercept)/2
• % uncertainty = (absolute uncertainty/mean intercept) x 100

Question 16

…. Questions on different types of conducted experiments?
(3 things)

Answer 16

• Our knowledge on these experiments or graphs
• PLUS knowledge on the other specified topics stated on that “topic list”
• Mainly, we need to know about the other practicals from those specified topics