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Author Question: MNM Corporation gives each of its employees an aptitude test. The scores on the test are normally ... (Read 157 times)

Rafic Kaaki

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on: Mar 25, 2023

MNM Corporation gives each of its 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 25 is taken from a population of 500.

a.What are the expected value, the standard deviation, and the shape of the sampling distribution of ?
b.What is the probability that the average aptitude test in the sample will be between 70.14 and 82.14?
c.What is the probability that the average aptitude test in the sample will be greater than 82.68?
d.What is the probability that the average aptitude test in the sample will be less than 78.69?
e.Find a value, C, such that P( C) = .015.

Essentials of Statistics for Business and Economics ¦ Anderson, Sweeney, Williams, Camm, Cochran ¦ 7th Edition
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Marked as best answer by Rafic Kaaki on Mar 25, 2023

Htimsrs

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Reply #1 on: Mar 25, 2023
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Rafic Kaaki

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Reply 2 on: Mar 25, 2023
:D TYSM

CAPTAINAMERICA

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Reply 3 on: Yesterday
Wow, this really help

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