Professor Faulpelz asks a random sample of high school freshmen about their TV viewing habits. Four years later, he obtains their final high school grade-point averages and compares these with the answers about TV viewing habits. He finds that students who watch a lot of TV get lower grades than those who don't. When it comes to high school GPA, the answers to the Faulpelz questionnaire on TV viewing habits:
A) have predictive validity.
B) are invalid because they are biased against students whose parents watch TV a lot.
C) are invalid because there were no controls.
D) are invalid because of convenience sampling.

Question

Quizplus · Accepted Answer

The fact that Faulpelz's questionnaire on TV viewing habits is able to predict high school GPA suggests that it has predictive validity. This means that the questionnaire is measuring something that is relevant and important in determining academic success, and therefore, it can be considered a valid measure. The other options are not relevant or accurate explanations for why the survey may be invalid.

Professor Faulpelz Asks a Random Sample of High School Freshmen