Chapter 8.2, Problem 54E

a.

To determine

To provide: The statistical evidence that support the conclusion that the number of accidents are higher at 8:00 a.m. than 4:00 p.m.

Explanation of Solution

Given:

The data set is:

Hour	Number of accidents
1	5
2	8
3	17
4	31
5	24
6	18
7	12
8	7
9	1
10	0
11	2
12	14
13	21
14	12
15	10
16	1
17	0
18	1
19	3
20	21
21	23
22	18
23	11
24	2

Graph:

The figure could be constructed as:

  

Interpretation:

From the above plot, it is clear that the peak of number of accidents is higher at 8:00 a.m. than the 4:00 p.m. So, it indicates that claim is absolutely correct.