Independent Samples Test  
 Levene’s Test for Equality of Variances  ttest for Equality of Means  
F  Sig.  t  df  Sig. (2tailed)  Mean Difference  Std. Error Difference  95% Confidence Interval of the Difference  
Lower  Upper  
Frequency  Equal variances assumed  1.186  0.281  −5.119  58  0.001  −25.429  4.967  −35.371  −15.486 
Equal variances not assumed 

 −5.571  51.570  0.001  −25.429  4.564  −34.589  −16.268 