Identify each of the following by describing it or stating its value (where possible).
a. Population of interest
b. Sample
c. Parameter of interest
d. Statistic

In order to investigate how many hours a day students at their school tend to spend on course work outside of regularly scheduled class time, a statistics student takes a random sample of 150 students from their school by randomly choosing names from a list of all full-time students at their school that semester. Th e student finds that the average reported daily study hours among the 150 students is 2.23 hours.