A health and wellness coach is planning an experiment in order to find out if standing instead of sitting improves memory. Some of her twenty participants will memorize as many words from a list as possible while sitting, and the rest will do the same while standing. She will then record the numbers of words memorized and compare the averages of both groups.

Question

If the health and wellness coach wants her experiment results to be meaningful, which is the best way to determine the group of participants who will memorize words while standing? ( I chose C)

A. place those who prefer to stand in the standing group​
B. place those who prefer to sit in the standing group
C. ​place ten randomly chosen participants in the standing group and the rest in the sitting group
D. place ten randomly chosen participants in the group they prefer and the rest in the standing group

Answer 1

I agree, but it would be even better if you reversed the conditions later.