The t Test - The t-Test, Basic Version Consider the...

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The t -Test, Basic Version Consider the following scenario and two sets of data: A teacher hypothesized that having students answer warm up questions at the beginning of each class improved their test scores. She decided to test this hypothesis by having eleven of her students do warm up questions at the beginning of class and eleven of her students were allowed to sit and chat. She predicted that the students doing the warm up questions would have significantly higher test scores on the unit exam than students not doing the warm ups. Her exam results are in Table 1. Table 1. Hypothetical results of a test of the Warm up Hypothesis. Warm ups (Group 1 ) No Warm ups (Group 2 ) 89 74 89 78 90 84 90 88 90 88 92 91 92 91 94 91 96 92 97 92 100 94 Mean ( x ) Variance (σ 2 ) Can the teacher conclude that doing warm ups has a statistically significant effect on exam scores? She can do a t -Test on the data to determine the probability that the means of the two groups are not different. Overview
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This note was uploaded on 04/21/2011 for the course BIO 105 taught by Professor Staff during the Winter '08 term at Grand Valley State University.

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The t Test - The t-Test, Basic Version Consider the...

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