Question 70 of 975 • AISD (IPC) Integrated Physics and Chemistry B _ Credit Recovery 2025-26
An experiment is proposed to measure the effectiveness of a brand of sunscreen. Adult volunteers are randomly assigned to one of two brands of sunscreen and asked to enjoy a normal day at the beach. Each volunteer is asked to report back to the administrators after two hours, at which time both arms are assessed for sun exposure.
Answer
A
The volunteers are the explanatory variables.
B
The brands of sunscreen are the response variables.
C
The amount of time in the sun is the response variable.
D
The brands of sunscreen are the explanatory variables.