The customer service department claims that the mean time to correct a shipping error is 10 minutes. A random sample of 60 claims from company records showed the mean to be 9.2 minutes with a standard deviation of 4.7 minutes. At the .02 significance level can we conclude that the mean time to correcting a shipment is less than 10 minutes? Do the following:

a. State the null hypothesis and the alternate hypothesis

b. State the decision rule

c. Compute the value of the test statistic

d. What is your decision regarding Ho?

a. State the null hypothesis and the alternate hypothesis

b. State the decision rule

c. Compute the value of the test statistic

d. What is your decision regarding Ho?

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