Question
A national grocers magazine reports the typical shopper spends 9.5 minutes in line waiting to check out. A sample of 27 shoppers at the local
A national grocers magazine reports the typical shopper spends 9.5 minutes in line waiting to check out. A sample of 27 shoppers at the local Farmer Jacks showed a mean of 9.1 minutes with a standard deviation of 2.2 minutes. |
Is the waiting time at the local Farmer Jacks less than that reported in the national magazine? Use the 0.010 significance level. |
a. | What is the decision rule?(Negative amount should be indicated by a minus sign. Round your answer to 3 decimal places.) |
Reject H0: 9.5 and fail to reject H1: <9.5 when the test statistic is(Click to select)less thanequal togreater than. |
b. | The value of the test statistic is.(Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) |
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