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Suppose that a simple random sample of nequals=1515 individuals is obtained from a population that is...

Suppose that a simple random sample of

nequals=1515

individuals is obtained from a population that is skewed right with mean

muμequals=4141

and standard deviation

sigmaσequals=55.

math   Statistics-And-Probability   
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Answer #1

A) False, sampling distribution of sample mean is not approximately normal, because sample size n=15 is too small.and sample size is small and centeral limit therom can not be used in population is already right skewed

B) Mean of sampling distribution of sample mean = population mean = 41

C) standard deviation of sampling distribution of sample mean = population standard deviation/ sqrt (n)

= 55/sqrt(15)

=14.2

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