Read the passage below. What kind of variables are these

Read the passage below. What kind of variables are these — n, Basic Statistics

To examine a program for educating health professionals in a sports injury clinic
about the importance of keeping detailed medical records, a researcher does a
controlled trial in which the dependent variable is the range of motion of injured
joints, which is classified as (a) worse, (b) same, or (c) better, and the
independent variable is (a) program or (b) no program

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