Examples of comparison problems include:
a. salary broken down by male and female subpopulations
b. cost of living broken down by region of a country
c. recovery rate for a disease broken down by patients who have taken a drug and patients who have taken a placebo
d. starting salary of recent graduates broken down by academic major
e. all of these choices
Question 2
Correlation analysis is used to determine whether there is a linear relationship between an independent variable x and a dependent variable y.
Indicate whether the statement is true or false