Scores on the ACT test are normally distributed with a mean of 21.1 and a standard deviation

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Scores on the ACT test are normally distributed with a mean of 21.1 and a standard deviation of 4.8.

a. If one ACT score is randomly selected, find the probability that it is greater than 20.0.

b. If 25 ACT scores are randomly selected, find the probability that they have a mean greater than 20.

c. Find the ACT score that is the 90th percentile.

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Elementary Statistics

ISBN: 9780321500243

11th Edition

Authors: Mario F. Triola

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Question Posted: Jul 29, 2022 12:40 AM

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Scores on the ACT test are normally distributed with a mean of 21.1 and a standard deviation

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Let X be the Scores in ACT test So here X follows Normal ...View the full answer

Elementary Statistics

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