Unformatted text preview: o printed on blue paper but contained simple questions. Form 3 was printed on red paper, with difficult questions, and Form 4 was printed on red paper with simple questions. The researchers were interested in the impact that color and type of question had on exam score (out of 100 points). a. This research is based on: an observational study a randomized experiment b. Complete the following statements by circling the appropriate answer. i. The color of the paper is a(n) response explanatory variable categorica...
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- Summer '10
- Statistics, researcher, explanatory variable, red paper, variables. Confounding variables, blue paper