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Hypothesis test for a population mean E zyBooks catalog ? Help/FA Jump to level 1 A major retailer promises 2 day shipping for certain online

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Hypothesis test for a population mean E zyBooks catalog ? Help/FA Jump to level 1 A major retailer promises 2 day shipping for certain online orders. A consumer advocacy group believes that the shipping times are longer at a significance level of 0.05, and checks a randomly chosen sample of 400 orders. The results of the sample are given below. Shipping times Mean 2.05602454 Variance 0.48326032 Observations 400 Hypothesized Mean 2 df 399 t Stat 1.611824412 P(T

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