The distribution of room and board expenses per year at a four-year college is normally distributed with a mean of $5850 and standard deviation of $1125. Random samples of size 20 are drawn from this...

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Extracted text: The distribution of room and board expenses per year at a four-year college is normally distributed with a mean of $5850 and standard deviation of $1125. Random samples of size 20 are drawn from this population and the mean of each sample is determined. Which of the following mean expenses would be considered unusual? O A. $5180 O B. $6350 OC. $6180 O D. none of these


Extracted text: A population has a mean u= 132 and a standard deviation o = 23. Find the mean and standard deviation of the sampling distribution of sample means with sample size n=47. The mean is p- = |, and the standard deviation is o; =. (Round to three decimal places as needed.)