Answer: we have to compare the effects of method I and method II.
Explanation: (ii) he population of generalization if the method I is used will be all people who are willing to determine the effect of exercising with a training partner as compared to exercising alone.
(ii) The population of generalization, if method II is used, will be all people who exercise at a community fitness center.
The 2 methods I am answering for are:
ᄋ Method I: Recruit volunteers who are willing to participate. Randomly assign each participant to exercise with a training partner or to exercise alone.
ᄋ Method II: Select a random sample of people from all the people who exercise at a community fitness center. Ask each person in the sample whether they use a training partner, and use the response to create the two groups.