Question

1.i) In a study of women's feelings about relationships, questionnaires were sent to 10 million Canadian women. More than 2.3 million women responded. Of the married respondents, 65% had extra-marital relationships. Which of the following best describes this estimate? *

a) not biased

b) over-estimates the true percentage because of non-response bias

c) under-estimates the true percentage because of household bias

d)biased but will neither under-nor over-estimate the result because so many people responded

Answer 1

When more than 2.3 million women responded, we are not sure how many were married of those.

Of the married respondents, 65% had extra-marital. This can be an over-estimate as many women would have avoided this and that causes a non-response bias.

There would have been many who didn't respond and has no extra marital affair. Hence, it is an over-estimate.

The non-response bias occurs when people are unwilling or unable to respond to a survey due to a factor that makes them differ greatly from people who respond.

Option B is the right answer.