The amount of money collected by a snack bar at a large university has been reco

Question

The amount of money collected by a snack bar at a large university has been recorded daily for the past five years. Records indicate that the mean daily amount collected is $4000 and the standard deviation is $450. The distribution is skewed to the right due to several high volume days (including football game days). Suppose that 100 days were randomly selected from the five years and the average amount collected from those days was recorded. Which of the following describes the sampling distribution of the sample mean? A) skewed to the right with a mean of $4000 and a standard deviation of $450 B) normally distributed with a mean of $4000 and a standard deviation of $450 C) normally distributed with a mean of $4000 and a standard deviation of $45 D) normally distributed with a mean of $400 and a standard deviation of $45

Explanation / Answer

A) Skewed to the right with a mean $4000 and a standard deviation of $450.

since the sample are taken from the distribution which is skewed at the right.

and also the mean and variance remains constant as the sample mean and variance are the unbiased estimator for population mean and variance.

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