Question

You and some friends have decided to test the validity of an advertisement by a local pizza restaurant, which says it delivers to the dormitories faster than a local branch of a national chain. Both the local pizza restaurant and national chain are located across the street from your college campus. You define the variable of interest as the delivery time, in minutes, from the time the pizza is ordered to when it is delivered. You collect the data by ordering 10 pizzas from the local pizza restaurant and 10 pizzas from the national chain at different times. The table below shows the descriptive statistics. The test statistic to test the hypothesis of equal variances is: (Use 2 decimal places) Local Chain Mean 16.7 Mean-18.88 SD 3.09 SD 2.87

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