Question

the proportion of college football players who have had at least one concussion is estimated to be 34% in the united states. we wanted to know if football players at our university were less likely to have suffered a concussion, so we surveyed a random sample of 100 past and present football players at our university. is this survey valid or not valid for testing the hypothesis that the proportion of college football players at our university with at least one concussion is less than the national average? a. valid b. not valid

Explanation:

The sample is only from one university's past and present football players. It may not be representative of all college football players at the university in a way that can be compared to the national average. There could be unique factors at this particular university that affect concussion rates.

Answer:

B. Not valid