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The mean waiting time at the drive-through of a fast-food restaurant from the time an order is placed to the time the order is received
The mean waiting time at the drive-through of a fast-food restaurant from the time an order is placed to the time the order is received is 88.4 seconds. A manager devises a new drive-through system that he believes will decrease wait time. As a test, he initiates the new system at his restaurant and measures the wait time for 10 randomly selected orders. The wait times are provided in the table to the right. Complete parts (a) and (b) below. 107.3 79.0 68.2 96.3 56.3 84.3 76.8 70.2 66.2 85.4 LOADING... Click the icon to view the table of correlation coefficient critical values. Question content area bottom Part 1 (a) Because the sample size is small, the manager must verify that the wait time is normally distributed and the sample does not contain any outliers. The normal probability plot is shown below and the sample correlation coefficient is known to be requals0.986. Are the conditions for testing the hypothesis satisfied? Yes, No, the conditions are not are satisfied. The normal probability plot is not is linear enough, since the correlation coefficient is greater less than the critical value. In addition, a boxplot does not show any outliers
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