Mike believes that the average duration of a movie is equal to 150 minutes. Stephanie does not agree with Mike. She coll

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Mike Believes That The Average Duration Of A Movie Is Equal To 150 Minutes Stephanie Does Not Agree With Mike She Coll 1 (145.7 KiB) Viewed 83 times

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Mike believes that the average duration of a movie is equal to 150 minutes. Stephanie does not agree with Mike. She collected sample data of five movies and the durations of these movies are shown as follows. Assume the distribution of movie time follows normal distribution. According to the information, answer the following two questions. 165 145 175 160 172
Calculate the test statistic. Keep 3 decimals
At a = 0.10, what is the critical value? Keep 3 decimals.
Walmart is interested in finding out if there is any difference in the proportion of shoppers who prefer two different brands. The survey results are shown as follows. You are now asked to conduct the following hypothesis test: Ho: P1 – P2 = 0; Ha: P1 – P2 + 0. Calculate the test statistic and type in the following box. Keep 2 decimals. Brand Shoppers surveyed Shoppers prefer this brand 800 550 A (population 1) B (population 2) 700 510