Class Notes

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

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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.
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 in order to analyze the potential difference between two
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This note was uploaded on 02/24/2011 for the course PSYC 228 taught by Professor Hutcheson during the Spring '10 term at South Carolina.

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

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