A Researcher Wishes to Estimate the Textbook Costs of First-Year

Multiple Choice

A researcher wishes to estimate the textbook costs of first-year students at Barry University.To do so,he recorded the textbook cost of 300 first-year students and found that their average textbook cost was $195 per semester.The variable of interest to the researcher is

A) textbook cost.
B) class rank.
C) number of students.
D) name of university.