Office workers are randomly divided into two groups. One group takes meditation breaks throughout the day;the other takes 10 -minute walks every 2 hours. After 1 month, each groups given a stress test to compare stress levels.

Question

Choose the correct description of the study.
A.
The study is an observational study because the researchers control one variable to determine the effect on the response variable.
B.
The study is an experiment because the study examines individuals in a​ sample, but does not try to influence the variable of interest.
C.
The study is an observational study because the study examines individuals in a​ sample, but does not try to influence the variable of interest.
D.
The study is an experiment because the researchers control one variable to determine the effect on the response variable.

Answer 1

D. The study is an experiment because the researchers control one variable (the type of break) to determine the effect on the response variable (stress levels).