A teacher wants to know if using a calculator during class with help her students do better on the end of course test. She randomly selected three classes to use calculators everyday and three classes to only use calculators on tests and quizzes. In the end she will compare results of the end of course exam. Determine if this is an observational study or an experiment and why. a) Observational study because no treatment was given. b) Observational study because she only observing the class and not teaching any differently. c) Experiment because a treatment is given. d) Experiment because she will be comparing the results of the end of course exam.
Added by Melinda K.
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The teacher is giving a treatment (using calculators every day) to some classes and not to others. Show more…
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