A national grocer\'s magazine reports the typical shopper spends 7.5 minutes in

Question

A national grocer's magazine reports the typical shopper spends 7.5 minutes in line waiting to check out. A sample of 25 shoppers at the local Farmer Jack's showed a mean of 6.5 minutes with a standard deviation of 2.2 minutes. Is the waiting time at the local Farmer Jack's less than that reported in the national magazine? Use the 0.050 significance level. What is the decision rule? (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) Reject H_0: mu Greaterthanorequalto 7.5 and fail to reject H_1: mu lessthan 7.5 when the test statistic is The value of the test statistic is (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) What is your decision regarding H_0? Do not reject H_0 Reject H_0

Explanation / Answer

Z=( 7.5-6.5)/ (2.2/sqrt25)=0.44

t value at 95% and df 25 is 1.708

So t statistic should be lessthan 1.708

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