Question

question 11 of 25
you conduct an experiment to find out the average time at which people in your community go to sleep. you send a survey to everyone at your school. why might this experiment fail to give accurate results?

a. some people in your school might fail to fill out the survey.

b. you dont know everyone in your school personally.

c. the age of the survey takers isnt very diverse.

d. a students performance on a report card may affect the experiment.

Explanation:

To find the average sleep time of the community, surveying only school - goers (students) is a problem. The community has people of various age groups like children, teenagers, adults, and the elderly. But school - goers are mainly of a narrow age range (mostly students of similar ages). This lack of age diversity in the survey sample means the sample doesn't represent the entire community well. Option A is about non - response, but the main issue here is the unrepresentative sample due to age. Option B is irrelevant as personal acquaintance isn't needed for a survey. Option D is also irrelevant as report card performance has no relation to sleep time. So the key reason for inaccurate results is the lack of age diversity in the survey takers.

Answer:

C. The age of the survey takers isn't very diverse.