Question

Q1. American Theatres knows that a certain hit movie ran an average of 84 days
in each city and the corresponding standard deviation was 10 days. The
manager of the southeastern (SE) district was interested in comparing the
movie's popularity in his region with that in all of American's other theatres. He
randomly chose 75 theatres in his region and found that they ran the movie an
average of 81.5 days.
(a)
(b)
(c)
State the appropriate hypothesis for testing whether there was
a significant difference in the length of the picture's run
between theatres in the SE district and all of America's theatres
At a 1% significant level test these hypothesis.
What is the interval estimate at 99% confidence level of
difference in length of picture's run between theatres in SE
district and all of America's theatres

Answer 1

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