Most Analysts Focus on the Cost of Tuition as the Way

Most analysts focus on the cost of tuition as the way to measure the cost of a college education. But incidentals, such as textbook costs, are rarely considered. A researcher at Drummand
University wishes to estimate the textbook costs of first-year students at Drummand. To do so,
She monitored the textbook cost of 250 first-year students and found that their average textbook
Cost was $600 per semester. Identify the variable of interest to the researcher.

A) The textbook cost of first-year Drummand University students.
B) The year in school of Drummand University students.
C) The age of Drummand University students.
D) The cost of incidental expenses of Drummand University students.