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OpenStudy (anonymous):
A random sample of 130 students is chosen from a population of 4,500 students. If the mean IQ in the sample is 120 with a standard deviation of 5, what is the 99% confidence interval for the students' mean IQ score?
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OpenStudy (anonymous):
@Nurali
ganeshie8 (ganeshie8):
where are u stuck at ?
ganeshie8 (ganeshie8):
know how to find the Margin of error ?
ganeshie8 (ganeshie8):
Margin of error = \(Z^* \dfrac{s}{\sqrt{~n}} \)
ganeshie8 (ganeshie8):
seen this formula before ?
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