A Survey Is Sent to 100 Employees at a Community

Multiple Choice

A survey is sent to 100 employees at a community hospital asking if they support a law requiring motorcycle riders to wear helmets. The results indicate 88% support the law. If the actual proportion of the community's residents who support the law is 72%, the difference is most likely a result of:

A) sampling bias.
B) sampling variability.
C) an insufficient sample size.
D) a poorly worded questionnaire.