An educator wants to compare the effectiveness of computer software for teaching biology with that of a
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An educator wants to compare the effectiveness of computer software for teaching biology with that of a textbook presentation. She gives a biology pretest to each student in a group of high school juniors, then randomly divides them into two groups. One group uses the computer, and the other studies the text. At the end of the year, she tests all the students again and compares the increase in biology test scores in the two groups. Identify the explanatory and response variables in this study. Then determine if it is an experiment or an observational study. Explain your reasoning.
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The explanatory variable in this study is the type of learning material computer s...View the full answer
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