Answer:
The number described is a statistic.
Explanation:
We are given the following situation in the question:
"According to a sample of college students, the average amount of sleep they get each night is hours."
Test Statistic:
Average amount of sleep
Data:
Sample of college students
Since the test statistic was calculated for a a sample, the number described is a statistic.
A statistic is a value obtained opr computed from a sample.