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The Office of Student Services at a large western state university maintains information on the study...

The Office of Student Services at a large western state university maintains information on the study habits of its full-time students. Their studies indicate that the mean amount of time undergraduate students study per week is 20 hours. The hours studied follows the normal distribution with a population standard deviation of six hours. Suppose we select a random sample of 144 current students. What is the standard error of the mean?

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Given, mean = =20 hours standard deviation=0= 6 hours Sample size = n = 124 | کر The standard error of the mean SE(X) = 0 -

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