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Needing help with this practice question. Consider the e-billing case. The mean and the standard deviation ofthe sample of n = 65 payment times are

Needing help with this practice question.

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Consider the e-billing case. The mean and the standard deviation ofthe sample of n = 65 payment times are J? =18.1077 and s = 3.9612. Test H02 [.1 = 19.5 versus Hal [.1

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