RES/342
posted by Hamilton .
Suppose you devised a training program to raise student scores on a standardized test, such as ACT, or AIMS (like in Arizona). You first administer the test to a random sample of students, record their scores, administer the training to these students, and then administer the test a second time to each of the same students. For each student you record their score for the second test. (I am deliberately leaving out additional parameters, as you will see why in item b)
a. What would the null and alternate hypothesis be?
b. Assuming there was an increase in scores, do you think that only the training method was responsible? What other factors could explain the changes?

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Try some of the following links for information on each of the two items you ask:
1. http://www.google.com/search?q=null+%26+alternate+hypothesis+in+training+students+for+a+standardized+test&ie=utf8&oe=utf8&aq=t&rls=org.mozilla:enUS:official&client=firefoxa
2. http://www.google.com/search?q=if+scores+improve+after+training%2C+could+there+be+other+factors+to+explain+changes%3F&ie=utf8&oe=utf8&aq=t&rls=org.mozilla:enUS:official&client=firefoxa
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