Chapter 5.1, Problem 30E

(a)

To determine

To Explain: the few sentences comparing this distribution.

Explanation of Solution

Given:

People who had to wait longer, more often answered “Yes” , because the box of the box plot for ”Yes” lies greater than the box of the box plot for “No”.

The data for the “No” answered contained two outliers; the reason is that there are two dots above the box plot.

The time seems to be right-skewed, because most times take on low values (40 to 50 seconds).

The spread for the “Yes” answers is more than for the “No” an answer, the reason is that the distance between the whiskers for the “Yes” box plot is bigger.

(b)

To determine

To Explain: the conclusion which is having someone waiting causes drivers to leave their spaces more slowly.

Answer to Problem 30E

Yes

Explanation of Solution

Given:

Yes, because the box plot for when somebody was waiting (“Yes”) lies greater than the box plot for when somebody was not waiting (“No”).

This is also normal, because if there is somebody waiting then it requires taking into account the distance to the waiting vehicle. Such that you do not hit the waiting vehicle.