MNM Corporation gives each of its 500 employees an aptitude test. The scores on the test are normally distributed with a mean of 75 and a standard deviation of 15. A simple random sample of 36 is taken from the population of 500 employees.   Using only the appropriate statistical table in your textbook, what is the probability that the average aptitude test score in the sample will be less than 78.69? ANSWER:  (Report your final answer to 4 decimal places, using conventional rounding rules)   Using only the appropriate statistical table in your textbook, four percent of the samples of n = 36 taken from this population should have a mean test score above what value? ANSWER:  (Report your final answer to 4 decimal places, using conventional rounding rules)

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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MNM Corporation gives each of its 500 employees an aptitude test. The scores on the test are normally distributed with a mean of 75 and a standard deviation of 15. A simple random sample of 36 is taken from the population of 500 employees.

 

Using only the appropriate statistical table in your textbook, what is the probability that the average aptitude test score in the sample will be less than 78.69?

ANSWER:  (Report your final answer to 4 decimal places, using conventional rounding rules)

 

Using only the appropriate statistical table in your textbook, four percent of the samples of n = 36 taken from this population should have a mean test score above what value?

ANSWER:  (Report your final answer to 4 decimal places, using conventional rounding rules)

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