Multiple Choice Questions An educational software company wants to compare the effectiveness of its computer animation for teaching biology with that of a textbook presentation. The company gives a biology pretest to each of a randomly chosen group of high school juniors, and then randomly divides them into two groups. One group uses the animation, and the other studies the test. The company retests all students and compares the increase in biology test scores in the two groups. Was the above study an observational study or an experiment? Could a cause-and-effect relationship possibly be established using the results of this study? A. Observational study; cause-and-effect could not possibly be established B. Observational study; cause-and-effect could possibly be established C. Experiment; cause-and-effect could possibly be established D. Experiment; cause-and-effect could not possibly be established

Multiple Choice Questions An educational software company wants to compare the effectiveness of its computer animation for teaching biology with that of a textbook presentation. The company gives a biology pretest to each of a randomly chosen group of high school juniors, and then randomly divides them into two groups. One group uses the animation, and the other studies the test. The company retests all students and compares the increase in biology test scores in the two groups. Was the above study an observational study or an experiment? Could a cause-and-effect relationship possibly be established using the results of this study? A. Observational study; cause-and-effect could not possibly be established B. Observational study; cause-and-effect could possibly be established C. Experiment; cause-and-effect could possibly be established D. Experiment; cause-and-effect could not possibly be established

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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