| Levene’s test for equality of variances | t-test for equality of means | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
F | Sig | t | df | Sig. (2-tailed) | Mean difference | Std. error difference | 95% Confidence interval of the difference | |||
Lower | Upper | |||||||||
Dif.VOC | Equal variances assumed | 1.878 | 0.176 | − 3.341 | 59 | 0.001 | − 4.220 | 1.263 | − 6.748 | − 1.692 |
Equal variances not assumed |  |  | − 3.357 | 55.53 | 0.001 | − 4.220 | 1.257 | − 6.739 | − 1.701 |