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Unformatted text preview: / Everyday). a. Is this an observational study or a randomized experiment? An observational study (recorded the variables, not assigned to a level). b. What are the explanatory and response variables? Response = number of visits (quantitative and discrete) Explanatory = type of diet and amount of exercise (here both categorical). 29 Try It! External Clues Study A study examined how external clues influence student performance. Undergraduate students were randomly assigned to one of four different forms for their midterm exam. Form 1 was printed on blue paper and contained difficult questions, while Form 2 was als...
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- Summer '10