The distribution exam grades for an introductory psychology class is negatively skewed with a mean of m

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The distribution exam grades for an introductory psychology class is negatively skewed with a mean of m 5 71.5 and a standard deviation of s 5 12.

a. What is the probability of selecting a random sample of n 5 9 students with an average grade greater than 75? (Careful: This is a trick question.)

b. What is the probability of selecting a random sample of n 5 36 students with an average grade greater than 75?

c. For a sample of n 5 36 students, what is the probability that the average grade is between 70 and 75?

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Essentials Of Statistics For The Behavioral Sciences

ISBN: 9781337098120

9th Edition

Authors: Frederick J Gravetter, Larry B. Wallnau, Lori Ann B. Forzano

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Question Posted: Jul 18, 2024 10:10 AM

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The distribution exam grades for an introductory psychology class is negatively skewed with a mean of m

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Essentials Of Statistics For The Behavioral Sciences

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