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| Mean | Standard deviation | Standard error mean | 96% confidence interval of the difference | t | df | Sig. (2-tailed) | ||
|---|---|---|---|---|---|---|---|---|
| Lower |
Upper |
|||||||
| Pre-test and post-test scores | –2.935 | 2.744 | .493 | –3.942 | –1.929 | –5.956 | 30 | .000 |
