a radio station chose 1000 at random within it's broadcast area. it sent a survey to be filled out that asked questions about radio habits. the survey was to be filled out and sent back in to the radio station. indentify a problem with the study.
A.) The relationship between two variables implies one causes the other. B.) A nonresponse occurred. C.) Some of the sample data are missing. D.) The conclusion is based on a voluntary response sample.
