A questionnaire on a table at a shopping mall was completed by ...

[Pineappleeh]

A questionnaire on a table at a shopping mall was completed by 100 shoppers. The results were used to claim that the average amount of money spent by Americans increased from the previous year. Explain why this claim is questionable.

Question 2

A student survey to find out whether more classes should be offered in the evening was mailed to all enrolled students at a university. Explain what a potential difficulty with this method is.

[KKcool]

Answer to Question 1

The sample of shoppers who responded was a self-selected sample, so the results cannot be generalized to any larger population.

Answer to Question 2

The sample of students who respond will be based on a volunteer response. The sample of respondents may not be representative of the opinion of all students in the university. Those who want more evening classes are probably more likely to respond.

[Pineappleeh]

TY

[KKcool]

You're welcome