Which of the following situations describes data from two separate populations?

A) the grade point averages of 20 students before participating in a tutoring program compared with their grade point averages after participating in the program
B) the salaries of 50 engineers in Houston compared with the salaries of 50 engineers in San Diego
C) the scores of 500 eighth-grade students on a reading test in September compared to their scores in June
D) the percentage of successful goals for 30 athletes before participating in a soccer camp and after participating in the soccer camp

1 answer

The situation that describes data from two separate populations is:

B) the salaries of 50 engineers in Houston compared with the salaries of 50 engineers in San Diego

In this case, you are comparing two distinct groups of engineers from different geographical locations, which qualifies as data from two separate populations. The other options involve comparisons of data from the same individuals before and after an event or program, which does not represent two separate populations.