Hypothesis test for single mean

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Reference no: EM1321160

Question: Jiffy lube advertises a thirty minute oil change. A sample of thirty-five customers showed a mean change time of thirty-four and a standard deviation of 8.3 minutes. Assuming normality, at the α = .05 level, is there enough evidence to show the mean oil change time is different?

Reference no: EM1321160

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