The amounts of time employees at a large corporation work each day are normally

Question

The amounts of time employees at a large corporation work each day are normally distributed, with a mean of 7.7 hours and a standard deviation of 0.38 hour. Random samples of size 22 and 37 are drawn from the population and the mean of each sample is determined. What happons to the mean and the standard deviation of the distribution of sample means as the size of the sample increases? If the sample size is n 22, find the mean and standard deviation of the distribution of sample means. The mean of the distribution of sample means is (Type an integer or a decimal.) The standard deviation of the distribution of sample means is Round to two decimal places as needed.) lf the sample sze is n# 37, find the mean and standard devotion of the distribution of sample means. The mean of the distribution of sample means is (Type an integer or a decimal.) The standard deviation of the distribution of sample means is Type an integer or decimal rounded to the nearest hundredth as needed.) What happens to the mean and the standard deviation of the distribution of sample means as the size of the sample increases? Choose the correct answer below O A. The mean stays the same, but the standard deviation increases O B. The mean and the standard deviation both increase O C. The mean and the standard deviation both decrease O D. The mean stays the same, but the standard deviation decreases. ols

Explanation / Answer

The mean of the distrubutuion of sample mean is 22
the std Deviation of the distrbution of simple means is N
The mean of the distrubutuion of sample mean is 37
C. The mean and the std Deviation both decrese.

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