A population has a mean mu=86 and a standard deviation sigma=22. Find the mean and standard deviation of a sampling distribution of sample means with sample size n=248.
Solution :
Given that ,
mean =
= 86
standard deviation =
= 22
n = 248
sampling distribution of sample mean
=
= 86
sampling distribution of stnadrad deviation
=
/
n = 22 /
248=1.397
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