A professor believes that this semester's class is performing at a different level than previous classes. The average of all previous classes is 79 (out of 100) with a standard deviation of 14. A sample of 100 students from this year's class has an average of 83 with a standard deviation of 12. Assume that the criterion of a normal distribution is met for this example.What is the value of the effect size in this experiment?
Added by Anthony S.
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Effect size is a quantitative measure of the magnitude of the experimenter effect. In this context, it is used to determine how much the average score of this year's class differs from the average score of previous classes. Show more…
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