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Mathematics, 28.01.2020 06:31 DangeRz
The distribution of the number of people in line at a grocery store has a mean of 3 and a variance of 9. a sample of the numbers of people in line in 50 stores is taken.
(a) calculate the probability that the sample mean is more than 4? round values to four decimal places.
(b) calculate the probability the sample mean is less than 2.5. round answers to four decimal places.
(c) calculate the probability that the the sample mean diļ¬ers from the population mean by less than 0.5. round answers to four decimal places.
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