Group Statistics RACE N Mean Std. Deviation Std. Error Mean INCIDENCE NHW 51 124.4902 7.91799 1.10874 AFAM 51 95.1824 43.29380 6.06234 Independent Samples Test Levene's Test for Equality of Variances 1-test for Equality of Means 95% Confidence Interval of the Significance Mean Std. Error Difference F Sig. df One-Sided p Two-Sided p Difference Difference Lower Upper INCIDENCE Equal variances assumed 40.596 <.001 equal variances not assumed independent samples effect sizes confidence interval standardizer point estimate lower upper incidence cohen d hedges correction .935 glass delta a. the denominator used in estimating sizes. uses pooled standard deviation. deviation plus a factor. sample of control group>