Dear allstaters,
The following is an output of MInitab 14:
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Estimation Method: Maximum Likelihood
Distribution: Exponential
Parameter Estimates
Standard 95.0% Normal CI
Parameter Estimate Error Lower Upper
Mean 39.8889 13.2963 20.7548 76.6630
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Using the classical formula for the 95% C.I. for the population mean:
(39.8889 - 1.96 *13.2963, 39.8889 + 1.96 *13.2963)
I obtain (13.8282, 65.9496). This is completely different from the Minitab
14 output above!
My question is: Which formula for the 95.0% Normal C.I. of the mean is used
by Minitab 14?
Thanks in advance.
M.E. Ghitany
