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Author Question: Scores on a particular test are normally distributed with a mean of 126 points. Find the standard ... (Read 145 times)

rlane42

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on: Jul 24, 2018
Scores on a particular test are normally distributed with a mean of 126 points. Find the standard deviation if for these scores, P90 = 160.0.

Question 2

The random variable x has a normal distribution with mean of 75.0 and standard deviation of 2.5 . Waiting times to see a doctor at a large clinic are normally distributed with a mean of 68.2 minutes and a standard deviation of 14.8 minutes. Find the probability that the waiting time to see a doctor is less than 45.0 minutes.


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jharrington11

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Reply #1 on: Jul 24, 2018
Answer to Question 1

26.6

Answer to Question 2

0.0582


rlane42

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Reply #2 on: Jul 24, 2018
Thanks


jharrington11

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Reply #3 on: Jul 24, 2018
Welcome :)


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