"Lee wants to observe what people do when they visit the gym. He visits every morning between 9 and 12 every day for two weeks. His coding schedule covers apparent age, and sex of the people being observed, plus a category for each piece of equipment they use." Why is his data likely to be biased?
A) Because he did not vary the times of his observation
B) Because he did not have mutually exclusive categories
C) Because he did not list all the equipment in the gym
D) Because he did not ask people for demographic information

Question

Quizplus · Accepted Answer

Lee's data is likely to be biased because he only observes during the morning hours, which may not represent the behavior of people who visit the gym at other times of the day.

"Lee Wants to Observe What People Do When They Visit