The margin of error in an interval estimate of the population mean is a function of...

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Answer 1

Answer #1

Sol;

margin of error =Tc*s/sqrt(n)

Tc-->t critical for given level of significance and df

s-sample standard dev

n-sample size

In excel using confidence .t fucntion for 0.05 level of significance,sample standard deviation=15 and sample size=n=40

ex:

=CONFIDENCE.T(0.05,15,40)

=4.797232732

ANSWER:

sample mean

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Answer 2

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