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The mean monthly out-of-pocket cost of prescription drugs for all senior citizens in a city is...

The mean monthly out-of-pocket cost of prescription drugs for all senior citizens in a city is $410 with a standard deviation of $81. Let x¯ be the mean of such costs for a random sample of 100 senior citizens from this city. Find the mean and standard deviation of the sampling distribution of x¯.

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Solution :- given that, u = $ 410 6 = $81 n = 100 Sampling distribution of the mean is __ MX = l = 410 I us = $410 Sampling d

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