Mathematics, 07.10.2019 19:30, lizzzyyy60
Asimple random sample of size nequals57 is obtained from a population with muequals69 and sigmaequals2. does the population need to be normally distributed for the sampling distribution of x overbar to be approximately normally distributed? why? what is the sampling distribution of x overbar?
Answers: 3
to be approximately normally distributed. Because of the central limit theorem. The sampling distribution of 
from a population with 
and 
. Because n is large enough (i.e., n > 30) and 
and 
are both finite, we can apply the central limit theorem that tell us that the sampling distribution of 
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Asimple random sample of size nequals57 is obtained from a population with muequals69 and sigmaequal...
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