Question

Suppose that a defined population is all women, and a survey is being conducted. Which of these is an example of selection bias? A. Including men in the selection process of the survey B. Including women with children in the selection process of the survey C. Excluding women with the children from the selection process of the survey D. Excluding men from the selection process of the survey

Answer 1

Answer: C. Excluding women with the children from the selection process of the survey.

Explanation:

Selection bias is the bias that is introduced while selecting the samples for study. The selection process is non-random. In this samples are selected for a purpose. In this selection of individuals in a study are different systematically from the population of interest this can lead to the systematic error in the outcome of the study. Also excluding individuals which are required for the study can also be considered as selection bias.

Among the options given C. is the correct option this is because of the fact that the population of interest is women, irrespective of the fact that they have children or not, but women are to be selected. Excluding women with children is a selection bias as this will create systematic error in the outcome of the study.

Answer 2

C. Excluding women with the children from the selection process of the survey

Explanation:

Here the defined population is all women. It is biased. The survey must be based all the women.

The answer is C. Excluding women with the children from the selection process of the survey

Thank you.