Answer Happy

7. Why did we use a "Paired Samples Test" (or repeated measures design) for this study? (Note: Do not mention because I was told to). (2 points) 8. What are the means, standard deviations, and standard error for both variables? (3 points) 9. What is the t statistic? (1 point) 0. Hand calculate the t statistic. (2 points) 1. Calculate the confidence interval. (1 point) 2. What is your conclusion? (2 points)

Paired Samples Statistics Mean 2.2500 N 20 Sed Deviation 95655 Std. Error Mean 21613 Pair! Pre-test grade before new teaching strategy Post-test grade alter new teaching strategy 3.3000 20 65695 14690 Paired Samples Correlations Significance N Correlation One-Sided p Two-Sidede Pre-test grade before 20 870 <.001 <.001 new teaching strategy Post-test grade after new teaching strategy Pair 1 Significance Paired Samples Test Paired Differences 95% Confidence interval of Std. Error the Difference Mean Lower Upper .11413 -1.28888 --81112 Std. Deviation Mean -1.05000 + -9.200 dr 19 Ose-Sidede <.001 Two-sided p <.001 Pair 51042 Pre-test grade before new teaching strategy - Post-test grade after new teaching strategy Paired Samples Effect Sizes Standardizer Point Estimate -2.057 95% Confidence interval Lower Upper -2.832 -1.255 Pair 1 Cohen's d 51042 Pre-fest grade before new teaching strategy Post-test grade after new teaching strategy Hedges' correction .52078 - 2.016 -2.775 -1.240