SOLUTION: random sample of 200 measurements give a mean of 50 and standard deviation of 9. at 5% level of significance, test the hypothesis that the population mean is 52.

Question 522150: random sample of 200 measurements give a mean of 50 and standard deviation of 9. at 5% level of significance, test the hypothesis that the population mean is 52.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
random sample of 200 measurements give a mean of 50 and standard deviation of 9. at 5% level of significance, test the hypothesis that the population mean is 52.
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Ho: u = 52 (claim)
Ha: u is not equal to 52
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sample mean = 50
z(50) = (50-52)/[9/sqrt(200)] = -3.1427
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p-value = P(z<-3.1427) = 0.00083705
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Since the p-value is less than 5%, reject Ho.
The test results do not support the claim.
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Cheers,
Stan H.
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