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Unformatted text preview: ge Entrance Examination Board. All rights reserved. Advanced Placement Program and AP are registered trademarks of the College Entrance Examination Board. 18 AP® STATISTICS 2002 SCORING GUIDELINES (Form B) Question 6 (cont’d.) Part 3: Correct mechanics, including the value of the test statistic, df, and P-value (or rejection region). 1990 2000 t = -.751 N 200 200 Mean 1.83 1.93 StDev 1.29 1.37 df = 396 SE Mean 0.091 0.097 P-value = .453 (or based on tables P-value > .20) Also OK to use conservative df of 199 OR Calculator using sample statistics: t = .7515, P-value = .4527, df = 396.57 Calculator using raw data t = .7512, P-value = .4529, df = 396.67 OR use a confidence interval approach: Difference = mu 1990 - mu 2000 Estimate for difference: -0.100 90 percent CI for difference: (-0.319, 0.119) OR use a “pooled” procedure t = -.751 p=.452 df = 398 OR if use rejection region, t.05 = + 1.660 Part 4: States a correct conclusion in the context of the problem, linking to the result of the statistical test. Because the P-value > α, fail to reject H0. There is not convincing evidence that the...
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This note was uploaded on 09/06/2013 for the course MATH AP Statist taught by Professor Mosby during the Spring '13 term at Silverton High School, Silverton.

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