Determine whether each number describes a population parameter or a sample statistic. Explain your reasoning.

1. A survey of several hundred collegiate student-athletes in the United States found that, during the season of their sport, the average time spent on athletics by student-athletes is 50 hours per week.

2. The freshman class at a university has an average SAT math score of 514.

3. In a random check of several hundred retail stores, the Food and Drug Administration found that 34% of the stores were not storing fish at the proper temperature.