Presenting Data

Question 1

When are bar charts used?

Answer 1

Bar Charts are used when the independent variable is categorical or discrete

Question 2

Discrete data can only take _______ ______ with no __-_______ values

Answer 2

Discrete data can only take certain values with no in-between values.

Question 3

When are graphs used?

Answer 3

When both variables are continuous

Question 4

True or false: continuous data can’t take any numerical value within a range

Answer 4

false

Question 5

What does the gradient tell you?

Answer 5

how quickly dependent variable changes if you change the independent variable

Question 6

Gradient-

(equation)

Answer 6

gradient= change in y/change in x

Question 7

What are the two types of correlation between variables?

Answer 7

• Positive Correlation
• Inverse Correlation (or Negative Correlation)

Question 8

Name three possible reasons for correlation:

Answer 8

• Chance (correlation may be a fluke)
• Third variable (another factor links the two variables)
• Cause (if every other variable that could affect the result is controlled, you can conclude that changing one variable causes the change in the other)