The survival times (in months) for two treatments for patients with severe chronic leftventricular heart failure are given in the following tables.
| Standard Therepy |
| 4 |
15 |
24 |
10 |
1 |
27 |
31 |
| 14 |
2 |
16 |
32 |
7 |
13 |
36 |
| 29 |
6 |
12 |
18 |
14 |
15 |
18 |
| 6 |
13 |
21 |
20 |
8 |
3 |
24 |
| New Therapy |
| 5 |
20 |
29 |
7 |
32 |
36 |
| 17 |
15 |
19 |
10 |
16 |
39 |
| 27 |
14 |
10 |
12 |
13 |
16 |
| 9 |
18 |
33 |
29 |
31 |
27 |
a. Construct separate relative frequency histograms for the survival times of both thetherapies.
b. Compare the two histograms. Does the new therapy appear to generate a longer survival time? Explain your answer.