More political polls

In the previous exercise, you decided to conduct an independent t-test to compare liberals and convervatives, since you were comparing two independent samples at a single point in time. The poll was so successful that you decide to conduct two more.

In the second poll, you want to understand the effect of a campaign speech on voters' preferences. You ask a single group of voters to rate their likelihood of voting for the candidate before the speech and again after the speech.

In the third poll, you want to understand if voters from a particular neighborhood are likely to vote differently when compared to the overall voting population. You poll voters from this neighborhood and compare the results to a recent and trustworthy national poll.

Which tests should you use for the second and third polls, respectively?

Possible answers

Dependent t-test, independent t-test

Independent t-test, single sample t-test

Single sample t-test, dependent t-test

Dependent t-test, single sample t-test

Exercise

More political polls

Instructions

Possible answers