A sports scientist investigated the relationship between the amount of strength-training runners perform each week and their finishing times in a city 10-kilometer race. All 2,300 runners registered for the race completed the race. From the list of all 2,300 registered runners, the scientist randomly selected 150 runners to interview immediately after they finished, and all 150 selected runners completed the interview. The table shows the data from the interviews.
| Weekly strength-training | Finish time >50 min | Finish time ≤50 min | Total |
|---|---|---|---|
| Fewer than 3 hours | 41 | 27 | 68 |
| 3 hours or more | 34 | 48 | 82 |
| Total | 75 | 75 | 150 |
Which of the following is the largest population to which the study's findings about the association between strength training and finishing times can be appropriately generalized?