The Registrar at a Small Liberal Arts College Computes Description

Multiple Choice

The registrar at a small liberal arts college computes description summaries for all members of the entering class on a regular basis.For example,the average high school GPA for the entering students in the most recent year was 3.16.The Chemistry department is interested in helping all students who wish to take a chemistry class identify the appropriate course,so they offer a placement exam.They randomly select a subset of 175 students who took this exam during the past decade,and found they had an average score on the exam of 71.05.The variable of interest to the Chemistry department in this study is the:

A) 175 selected students who took this exam during the past decade.
B) students' scores on the placement exam
C) average score on the placement exam.
D) GPA of the 175 students who took the placement exam.