Chapter 4, Problem T4.11SPT

To determine

To select the best option from the multiple choice question according to the given question.

Answer to Problem T4.11SPT

Option (d) is correct.

Explanation of Solution

Option (a) is false, as the sample is a voluntary response sample not a random sample.

Option (b) is false as non-face-o-face interviewers are also considered valid.

Option (c) is false because the non-response rate is still quite high.

Option (d) is true because the non-response rate is still quite high.

Option (e) is false as if the non-response rate of the voluntary response sample would have been 100%, then the result could be trusted.

Thus, option (d) is the correct option.