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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

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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 Shipping Times Mean 2.05602454 100 Variance 0.48326032 8 Observations 400 Hypothesized Mean N 399 8 8 829 8 89 t Stat 1.611824412 P(T

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