You are planning an experiment to determine the effect of the brand of gasoline and the weight of a car on gas mileage measured in miles per gallon. You will use a single test car, adding weights so that its total weight is 3000, 3500, or 4000 pounds. The car will drive on a test track at each weight using each of Exxon, Sunoco, and Texaco gasoline.
In this study,
A) gasoline brand is a categorical variable and weight is a quantitative variable.
B) gasoline brand and weight are both categorical variables.
C) gasoline brand and weight are both quantitative variables.
D) gasoline brand is a quantitative variable and weight is a categorical variable.

Question

Quizplus · Accepted Answer

Gasoline brand is a categorical variable since it falls into distinct categories or groups, whereas weight is a quantitative variable as it is measured in numerical values. Thus, option A is the correct choice.

You Are Planning an Experiment to Determine the Effect of the Brand