A population has a mean u = 155 and a standard deviation o = 21. Find the mean and standard deviation of the sampling distribution of sample means with sample size n = 50. The mean is , and the...

Extracted text: A population has a mean u = 155 and a standard deviation o = 21. Find the mean and standard deviation of the sampling distribution of sample means with sample size n = 50. The mean is , and the standard deviation is (Round to three decimal places as needed.)