A movie production company shows a soon-to-be released movie to two test audiences where each audience gets a different ending. In one ending the protagonist gets the girl and lives happily ever after (Ending A); in the other the protagonist marries someone much prettier and nicer (Ending B). The company observed that 34 of the 51 subjects who viewed Ending A recommended the movie and 53 of the 74 subjects who viewed Ending B recommended the movie. Proposition One: There are a sufficient number of subjects so that the observed chi square score can be validly interpreted using a table of chi square percentiles. Proposition Two: The sample size criterion has been established.
Added by Lindsey Z.
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The problem is to determine if there is a significant difference in the proportion of recommendations between the two different movie endings. We will use a chi-square test for independence. - Null Hypothesis (H0): There is no difference in the proportion of Show more…
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