For all free-response questions, remember to: a) answer the question that is asked, b) provide a complete justification for your answer, and c) answer in context (refer to details given in a specific question).
11. The question is flawed. The wording of the question introduces bias into the selection because it guides those questioned towards a particular response. In particular, respondents are going to find it difficult to disagree with an expert in the field.
12. No, Joe’s method is not appropriate. The thirteen students who did not respond may all have something in common that makes them less likely to respond than the other students.. This introduces the possibility of non-response bias.
13. No. This method does not allow the researcher to separate the effect of the treatment from the effects due to gender.