7.107 Average number of cars in the drive-thru lane.
Refer to the previous exercise. A related benchmark measure was the number of cars observed in the drive-thru lane. A summary for the same two chains is shown here.
Chain | |||
---|---|---|---|
Taco Bell | 308 | 2.11 | 2.83 |
McDonald’s | 317 | 3.81 | 4.56 |
7.107
(a) . The data are significant at the 5% level, and there is evidence the average number of cars in the drive-thru lane between the two chains is different. (b) Because , the procedures can be used for skewed data, as long as there are no outliers.