Wiley's Study Described the Achievement Test Scores and Reading Grades

Multiple Choice

Wiley's study described the achievement test scores and reading grades of a cross-sectional sample of elementary school students. He took the students' scores on an achievement test and divided the students into three groups based on their scores: high, medium, and low. He then described the reading scores of the students in the three groups. Why did he do this?

A) To turn his study into an experiment by having a categorical independent variable
B) Because every research study has to have a categorical variable
C) To create a categorical variable from a quantitative variable
D) To create a quantitative variable from a categorical variable