Question

If the sampled population has a mean 48 and standard deviation 18, then the mean and...

If the sampled population has a mean 48 and standard deviation 18, then the mean and the standard deviation for the sampling distribution of (X-bar) for n = 9 are:
A. 48 and 18
B. 48 and 9
C. 16 and 6
D. 48 and 6
E. 48 and 2


Math   Statistics-And-Probability   
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Answer #1

Solution :

Given that ,

mean = = 48

standard deviation = = 18

n = 9

sample distribution of sample mean is ,

=

= 48

sampling distribution of standard deviation

=  / n = 18 / 9

= 6

D. 48 and 6

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