When people are discharged from a hospital, they are surveyed about the quality of their stay. The hospital asks each person to turn in the survey before leaving. Is this a simple random sample? Yes, because each person has the opportunity to respond to the survey.

Yes, because each person is equally likely to get the survey.

No, because not everyone has the same opportunity to answer the survey.

No, because each person is asked to fill out the survey, so this is not a sample.