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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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
Transcribed Image Text:A Hollywood studio believes that a movie that is considered a drama will draw a larger crowd on average than a movie that is considered a comedy. To test this theory,
the studio randomly selects several movies that are classified as dramas and several movies that are classified as comedies and determines the box office revenue for
each movie. The results of the survey are as follows. Assume that the population variances are approximately equal.
Box Office Revenues
(Millions of Dollars)
n
Drama 10 160 30
Comedy 15 140 10
Copy Data
Calculate a 99 % confidence interval for the difference in mean revenue at the box office for drama and comedy movies. Let dramas be Population 1 and comedies be
Population 2. Write your answer using interval notation and round the interval endpoints to two decimal places.
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