Combine the data from the separate therapies in Exercise 3.7 into a single data set and...

Combine the data from the separate therapies in Exercise 3.7 into a single data set and construct a relative frequency histogram for this combined data set. Does the plot indicate that the data are from two separate populations? Explain your answer.

REFERENCE:

3.7 : The survival times (in months) for two treatments for patients with severe chronic left ventricular heart failure are given in the following tables.

a. Construct separate relative frequency histograms for the survival times of both the therapies.

b. Compare the two histograms. Does the new therapy appear to generate a longer survival time? Explain your answer.