The mean waiting time at the drive-through of a fast-foodrestaurant from the time an order is placed to the time the orderis received is 84.3 seconds. A manager devises a new drive-throughsystem that he believes will decrease wait time. He initiates thenew system at his restaurant and measures the wait time for tenrandomly selected orders. The wait times are provided in the tablebelow. Based on the given data, is the new system effective? Usethe ? = 0.10 level of significance.
| 106.5 | 67.4 | 58.0 | 75.9 | 65.1 |
| 80.4 | 95.5 | 87.3 | 70.9 | 71.0 |
On a separate sheet of paper, write down the hypotheses(H0 and Ha) to be tested.
Conditions:
Use Minitab Express to perform a normality test on the givendata.
The P-value for the Anderson-Darling test of normality is ______(Report this value exactly as it appears in Minitab Express. Donot round.)
Based on both the normal probability plot and this P-value, thet-test for means (is / isnot) valid for the given data.
Rejection Region:
To test the given hypotheses, we will use a (left/ right / two) -tailed test. Theappropriate critical value(s) for this test is/are _________. (Report your answer exactly as it appears in TableVI. For two-tailed tests, report both critical values in the answerblank separated by only a single space.)
