PSS Lab ests #2 Example Write-Up An independent samples t-test was conducted with the independent variable of cat group (cat-lover, cat-hater) and the dependent variable of happiness. On average, cat-lovers reported a higher level of happiness (M = 7.00, SD = 2.75) compared to cat-haters (M = 3.10, SD = 1.97); t (16.31) = 3.65, p = .002. This represents an average difference of 3.90 happiness points, 95% CI [1.64, 6.16]. This was a large effect, d = 1.63. HATERS GONNA HATE set stics nt San Group Statistics at San Type of Grad Program N Mean Std. Deviation Std. Error Mean Under GPA Clinical Psychology 20 3.7725 .17048 .03812 Experimental Psychology 20 3.6060 .31343 .07008 Under GPA Equal variances assumed Equal variances not assumed Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means 9 Significance F Sig. t df One-Sided p Two-Sided p Mean Difference Std. Error Difference 8.115 .007 2.087 38 .022 .044 .16650 .07978 2.087 29.337 .023 .046 .16650 .07978 Independent Samples Effect Sizes Standardizera 95% Confidence Interval Point Estimate Lower Upper Under_GPA Cohen's d .25229 .660 .019 1.293 Hedges' correction .25741 .647 .018 1.267 Glass's delta .31343 .531 -.117 1.167 a. The denominator used in estimating the effect sizes. Cohen's d uses the pooled standard deviation. Hedges' correction uses the pooled standard deviation, plus a correction factor. Glass's delta uses the sample standard deviation of the control group.