| 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 | ||||||||
Pretest scores | |||||||||
 Equal variances assumed | 3.736 | .056 | 1.294 | 94 | .199 | .4324 | .334 |  − .231 | 1.096 |
 Equal variances not assumed |  |  | 1.289 | 90.392 | .201 | .4324 | .335 |  − .233 | 1.098 |