The operation manager at a distribution center has two choice of routes for maki

Question

The operation manager at a distribution center has two choice of routes for making a weekly delivery to retail store. He wants to choose the route that will require, on average, the least amount of time for the delivery. To determine which route is faster, on average, he randomly selected 10 days and had the driver take route 1, and then randomly selected 10 different days and had the diver take route 2. The amount of time required to make the delivery each day was recorded. From the data, the manager constructed the following 95% confidence interval for the different in mean delivery times (route 1- route 2: (-1 minutes, 9 minutes). Based on this confidence interval, which of the following is a correct statement?

Explanation / Answer

A is the answer

Since 0 lies in the interval we conclude that mean time of delivery on both routs are same.

So we cannot say that one is faster than other

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