Table 3 Independent samples test—TBI influence on reading comprehension
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 | |||||||||
Reading pretest | Equal variances assumed | 0.190 | 0.665 | − 0.153 | 48 | 0.879 | − 0.0800 | 0.522 | − 1.131 | 0.971 |
Equal variances not assumed | − 0.153 | 47.998 | 0.879 | − 0.0800 | 0.522 | − 1.131 | 0.971 | |||
Reading posttest | Equal variances assumed | 22.089 | 0.235 | 6.277 | 48 | 0.000 | 6.200 | 0.987 | 4.214 | 8.185 |
Equal variances not assumed | 6.277 | 30.107 | 0.000 | 6.200 | 0.987 | 4.183 | 8.216 | |||