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Correct.

Incorrect.

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What type of bias is possible for mail-in surveys? Select all that apply.

wg8JNehuALfILP6Sa. Under-coverage bias

wg8JNehuALfILP6Sb. Non-response bias

wg8JNehuALfILP6Sc. Respondent bias

3hMJDRP6OS+3EJIbd. Interviewer bias

wg8JNehuALfILP6Se. Question wording bias

Incorrect. In a mail-in survey, interviewer bias is not possible because there is no interviewer. But non-response bias is particularly high for mail-in surveys. People just throw their surveys in the trash.

Correct. In a mail-in survey, interviewer bias is not possible because there is no interviewer. But non-response bias is particularly high for mail-in surveys. People just throw their surveys in the trash.

Incorrect. Try again.

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Which of the following are subjectively set by the researcher in the planning stage of a study when determining sample size? Select all that apply.

wg8JNehuALfILP6Sa. Level of significance

wg8JNehuALfILP6Sb. Size of the effect for which she would like to detect significance

3hMJDRP6OS+3EJIbc. The sample mean and sample standard deviation

wg8JNehuALfILP6Sd. Power (probability that she would like to have of rejecting an incorrect null hypothesis)

Incorrect. Significance level, effect size and power are all specified by the researcher in order to determine sample size.

Correct. Significance level, effect size and power are all specified by the researcher in order to determine sample size.

Incorrect. Try again.

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