15. A population of scores forms a normal distribution with a mean of 75 and a...
Question:
15. A population of scores forms a normal distribution with a mean of 75 and a standard deviation of
20.
a. What proportion of the scores in the population have values less than X 80?
b. If samples of n 4 are selected from the population, what proportion of the samples will have means less than M 80?
c. If samples of n 16 are selected from the population, what proportion of the samples will have means less than M 80?
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Related Book For 
Essentials Of Statistics For The Behavioral Sciences
ISBN: 9780495812203
7th Edition
Authors: Frederick J. Gravetter, Larry B. Wallnau
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