Chapter Notes - 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.
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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.
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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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This note was uploaded on 02/17/2011 for the course PYSC 228 taught by Professor Hutcheson during the Spring '10 term at South Carolina.

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Chapter Notes - Behold the Great and Powerful t-Test and...

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