Based on a random sample of movie lengths, the mean length is 110.5 minutes with a standard

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Based on a random sample of movie lengths, the mean length is 110.5 minutes with a standard deviation of 22.4 minutes. Assume that movie lengths are normally distributed.

a. What fraction of movies are more than 2 hours long?

b. What fraction of movies are less than lj hours long?

c. What is the probability that a randomly selected movie will be less than 2 hours long?

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Statistical Reasoning for Everyday Life

ISBN: 978-0321817624

4th edition

Authors: Jeff Bennett, Bill Briggs, Mario F. Triola

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Question Posted: Dec 23, 2015 07:36 AM

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Based on a random sample of movie lengths, the mean length is 110.5 minutes with a standard

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a z 120 1105 224 040 From Table 51 the percentage less than 2 hours 120 minutes is 655...View the full answer

Statistical Reasoning for Everyday Life

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