Probability of a type two error

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Reference no: EM1319972

A hypothesis test is to be performed to determine whether the mean waiting time during peak hours for customers in a grocery store has changed from the previous waiting time of 8.3 minutes. Preliminary data analyses indicate that it is reasonable to apply a z-test, with population standard deviation 3.6 minutes. The sample size is 45. The significance level is 0.05. Find the probability of a Type II error if in fact the mean waiting time is actually 9.8 minutes.

Reference no: EM1319972

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