SOLUTION: construct the confidence interval for the population mean C=90, X= 15.1, S = 8.0, N= 40

Question 321760: construct the confidence interval for the population mean C=90, X= 15.1, S = 8.0, N= 40
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
construct the confidence interval for the population mean
C=90, X= 15.1, S = 8.0, N= 40
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x-bar = 15.1
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E = t*s/sqrt(n)
E = invT(0.95 with df = 39)*8/sqrt(40) = 1.6849*(1.2649) = 2.1312
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90% CI: 15.1-2.1312 < u < 15.1+2.1312
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Cheers,
Stan H.
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