[Objective: Understand the Hypothesis Test of Proportions from Two Populations]

question 52

Multiple Choice

[Objective: Understand the hypothesis test of proportions from two populations] Two movie reviewers give movies "thumbs Up" and "thumbs down" ratings. You sample 100 movies that they both have rated and find that they both gave "thumbs up" to 25 movies, both gave "thumbs down" to 30 movies, Sarah gave "thumbs up" and Jessica "thumb down" to 28 movies, and the remaining movies Sarah gave "thumbs down" and Jessica "thumbs up". Test whether there is a tendency for one reviewer to give more movies "thumbs up" (proportion 1) than the other (proportion 2) .

• A) z=1.56 For a two-sided test at \alpha=0.05 level, there is insufficient evidence to reject the null hypothesis because the cutoff z-value is at 1.96.
• B) z=-1.56 For a two-sided test at \alpha=0.05 level, there is insufficient evidence to reject the null hypothesis because the cutoff z-value is at 1.96.
• C) z=1.96 There is sufficient evidence to accept the null hypothesis.
• D) z=-1.96 There is sufficient evidence to reject the null hypothesis.

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Definitions:

Milgram Experiment

A psychological experiment conducted by Stanley Milgram in the 1960s to study obedience to authority, where participants were instructed to administer electric shocks to another person.

Stanford University Prison Experiment

A psychological study conducted by Philip Zimbardo in 1971 at Stanford University, where students were assigned roles of prisoners and guards to explore the effects of perceived power.

Generalization

Drawing a conclusion about a certain characteristic of a population based on a sample from it.

Logical Support

The provision of reasons or evidence to justify a claim or argument.