Question

a nutritionist would like to estimate the number of times adults exercise each week. to collect information, the nutritionist emails the members of the local fitness center. which of the following describes the bias that may arise from the results?

this is a convenience sample and likely overestimates the frequency of exercise.

this is a convenience sample and likely underestimates the frequency of exercise.

this is a voluntary response sample and likely overestimates the frequency of exercise.

this is a voluntary response sample and likely underestimates the frequency of exercise.

Explanation:

The nutritionist emails local fitness center members, a group that exercises more regularly than the general adult population. This is a convenience sample (using easily accessible participants) and will likely overestimate average exercise frequency.

Answer:

A. This is a convenience sample and likely overestimates the frequency of exercise.