Mathematics, 26.09.2019 22:10 aletadaboss

The electric cooperative needs to know the mean household usage of electricity by its non-commercial customers in kwh per day. assume that the population standard deviation is 2.5 kwh. the mean electricity usage per family was found to be 16.5 kwh per day for a sample of 3861 families. construct the 98% confidence interval for the mean usage of electricity. round your answers to one decimal place.

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The electric cooperative needs to know the mean household usage of electricity by its non-commercial...