Question 11 • Probability and Statistics with Applications Honors Sem-1-FL-1210300 (2024-2025)
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?
Answer
A
This is a convenience sample and likely overestimates the frequency of exercise.
B
This is a convenience sample and likely underestimates the frequency of exercise.
C
This is a voluntary response sample and likely overestimates the frequency of exercise.
D
This is a voluntary response sample and likely underestimates the frequency of exercise.
Explanation
People who choose to reply to the email make this a voluntary response sample. Those who exercise frequently may be more likely to respond, and fitness center members are also likely to exercise more than adults generally. The results would therefore likely overestimate how often adults exercise.
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