Scores on the ACT test have a distribution that is approximately normal with mean 21.1 and standard

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Scores on the ACT test have a distribution that is approximately normal with mean 21.1 and standard deviation 5.1. A sample of 80 ACT scores is randomly selected and the sample mean is computed.
a. Describe the distribution of such sample means.
b. What is the mean of all such sample means?
c. What is the standard deviation of all such sample means?
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
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Elementary Statistics

ISBN: 9780321836960

12th Edition

Authors: Mario F. Triola

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