Question

Asked Apr 15, 2019

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Step 1

**Explanation:**

The friend specifically believes that the new route is faster than the current route. This means that, according to the friend, the current route takes more time than the new route.

Now, the difference for each of the 7 days is obtained by subtracting the time taken on the current route, from that of the new route. So, if the friend’s claim is true and the current route really takes more time than the new one, this is subtracting a higher value from a lower value. Then the mean difference, *µd*, would be negative or less than 0.

Thus, the alternative hypothesis is:

*Ha*: *µd* < 0, that is, the new...

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