Question 247393
A 95% confidence interval estimate for a population mean was computed to be (60.0 to 68.6). Determine the mean of the sample, which was used to determine the interval estimate (Please show all work) 
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E-xbar = 60
E+xbar = 68.6
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Subtract 1st from 2nd and solve for xbar:
2xbar = 8.6
x-bar = 4.3
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Cheers,
Stan H.