Chapter 4: Scatterplots and correlation

Question 1

An explanatory (Independent) variable is the _____ while A response (dependent) variable is the ______

Answer 1

cause

effect

Question 2

Typically, the _______ variable is plotted on the x axis and _____ variable on the y axis

Answer 2

explanatory (Independent)

response (dependent)

Question 3

A _________ shows the relationship between two quantitative variables measured on the same individual

Answer 3

Scatteplot

Question 4

Two variables ate positively associated when

Answer 4

above average values are together

Question 5

Two variables are negatively associated when

Answer 5

above average is with below average value

Question 6

The variation and scatter tells us the ___ of a ______

Answer 6

strength of a relationship

Question 7

Correlation ____ distinguish between explanatory and response variables

a: does
b: does not

Answer 7

Does not

Question 8

what does correlation r do?

Answer 8

measures the direction and strength of the linear relationship between 2 quantitative variables

Question 9

r can be either ____ or ____

Answer 9

+1 or -1