Question: SEE SCREEN SHOT FOR REFERENCE: A major retailer promises 2 day shipping for certain online orders. A consumer advocacy group believes that the shipping times

SEE SCREEN SHOT FOR REFERENCE:

A major retailer promises 2 day shipping for certain online orders. A consumer advocacy group believes that the shipping times are longer at a signicance 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 (148326032 :2 Observations 400 7o Hypothesized Mean 2 :2 df 399 40 t Stat 1.611824412 :3 P(T

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