Question: To help assess student learning in her developmental math courses, a mathematics professor at a community college implemented pre- and posttests for her students. A

To help assess student learning in her developmental math courses, a mathematics professor at a community college implemented pre- and posttests for her students. A knowledge-gained score was obtained by taking the difference of the two test scores.
(a) What type of experimental design is this?
(b) What is the response variable in this experiment?
(c) What is the treatment?

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