Question

In each scenario below, specify each variable as a response variable, an explanatory variable , or neither.

a. A researcher collects measurements of VO2 max and resting heart rate on a group of subjects to study the relationship between these two variables.

b. A real estate agent wants to be able to predict selling prices of houses in Vancouver. He collects data on 100 recently sold houses , recording their selling prices, size, age, number of bedrooms, and whether they had a suite.

c. A physicist is investigating particle decay rates . She conducts a series of experiments ,recording in each the number of remaining particles at each time point.

Answer 1

a. A researcher collects measurements of VO2 max and resting heart rate on a group of subjects to study the relationship between these two variables.

response variable: VO2 max

explanatory variable: resting heart rate

b. A real estate agent wants to be able to predict selling prices of houses in Vancouver. He collects data on 100 recently sold houses, recording their selling prices, size, age, number of bedrooms, and whether they had a suite.

response variable: selling prices of houses in Vancouver

explanatory variables: size, age, number of bedrooms, and whether they had a suite.

c. A physicist is investigating particle decay rates. She conducts a series of experiments, recording in each the number of remaining particles at each time point.

response variable: decay rates

explanatory variable: number of remaining particles, time