Question Are you unemployed, where were you born, your height, your weight, and your profession?

Questiona) When a school instructor created a set of assignments, there were 33 responses. But there were about 270 students enrolled in this class. In a previous survey for this class, the tutor ended up getting about 150 responses.

What is the population for this sample survey? What was the desired (target) sample? Is this a census? What is the natural "frame" for this survey?

Questionb) This question refers to the same survey. For each of the five questions asked by the instructor, say whether item nonresponse is likely to occur and how this might affect or bias the results for that question. If the student missed it in class, item nonresponse describes what happens when the respondent answers only part of the question; unit nonresponse occurs when the respondent does not answer any of the questions.

Question c) For each term below, please discuss whether this survey is likely to be such a problem. If your comments apply only to a specific question, please say so and be specific you want to tell me specifically why they may or may not be a problem.

Frame errors (undercoverage or overcoverage). response errors sampling errors