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Mathematics, 15.04.2020 03:28 shookie1993

A sample of 26 offshore oil workers took part in a simulated escape exercise, and their escape time (unit: second) were observed. The sample mean and sample standard deviation are 370.69 and 24.36, respectively.
Suppose the investigators had believed a priori that true average escape time would be at most 6 minutes.
Does the data contradict this prior belief? Assuming normality, test the appropriate hypotheses using the rejection region method at a significance level of 0.05.

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