Question 310096
construct the indicated confidence interval for the population mean mu using a t distribution, s=10, c= .80, x bar =114, n=9
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x-bar = 114
E = (invT(0.0.9 with df=8)*10/sqrt(9)
= 1.3968*(10/3)
= 4.6561
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80% CI: 114-6.6561 < u < 114+6.6561
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Cheers,
Stan H.
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