Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means 95% Confidence Interval of the Mean Std. Error Difference F Sig. + Sig. (2-tailed) Difference Difference Lower Upper final Equal variances 041 840 1.138 103 258 1.735 1.525 -1.290 4.760 assumed Equal variances not 1.109 78.097 271 1.735 1.565 -1.380 4.851 assumed