A radio station sent a letter in the mail to 1000 randomly chosen residents within its broadcast area. The letter contained one dollar and a survey. The survey asked recipients to track their radio habits over a week. The survey was to be filled out and sent back in to the radio station. Identify a problem with the study.
A) Some of the sample data are missing
C) The data are based on reported results
D) The correlation between the variables implies causality
The problem is that the data are based on reported results, answer C.
This is a problem because when someone self-reports information it is not always accurate. In some instances, those who self-report are not always honest when filling out survey information.
