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  
HL  Equal variances assumed  1.327  0.250  −2.367  316  0.019  −0.20929  0.08843  −0.38328  −0.03530 
Equal variances not assumed 

 −2.712  146.488  0.007  −0.20929  0.07717  −0.36181  −0.05678 