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t_test and ANOVA

# t_test and ANOVA - Behold the Great and Powerful t-Test.and...

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Behold the Great and Powerful t -Test… …and the Wonderful ANOVA

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t- Test : a statistic reflecting the ratio of variance between two normal distributions. The standard deviation is unknown.* the higher the t-score, the greater the separation between the two distributions. *That’s if you are testing a sample vs. population.
Experimental Group Control Group

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An example Bill is evaluating the difference between Mrs. Clark’s class and Mrs. Jenkins’ class regarding scores on a math quiz. The grades for both classes are shown on the following table.
Mrs. Clark’s class Mrs. Jenkins’ class 90 86 82 92 82 80 94 80 86 96 96 84 80 88

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The class average for Mrs. Clark is 87.14 The class average for Mrs. Jenkins is 86.57 In order to see if there is a significant difference between the two classes, Bill must run a t-test.

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Bill’s results indicate that t (12) = .174, p > .05 What does this mean?

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How it is written in a paper An independent groups t-test was conducted
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