The major advantage(s) of the Pre-Post Randomized Sample Design is... Because yo
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The major advantage(s) of the Pre-Post Randomized Sample Design is... Because you took one or more pre-tests, you know a lot more about the two groups, and if there are differences, you can re-sample to get more equivalent treatment and control groups to start your experiment. Because you took more than one random sample, you know that these variations pre-treatment are random, and therefore, pre-test differences have to be real differences between the two groups. Adding the pre-test differences to the post-test differences, gives the overall effect of the treatment. Because you took one or more pre-tests, you can algebraically account for these random differences when analyzing your post-treatment measurements. Because you took a random sample, you know that these variations pre-treatment are random, and therefore you can just subtract them from the pre-test mean to equilibrate the two samples! Because you took one or more pre-tests, you can block on these to reduce your overall error of measurement post-treatment. Because you took a random sample, you know that you don't have any pre-existing bias in your samples.Explanation / Answer
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