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A group of college students believes the average grades in psychology course are different than the average grades in biology courses. The group found the
A group of college students believes the average grades in psychology course are different than the average grades in biology courses. The group found the average psychology grades of a sample of 12 students was 84.4 and the average biology grades of a sample of 11 students was 82.2. What is the null hypothesis for this study?
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