Table 3 Descriptive statistics
| Â | N | Mean | Std. deviation | Std. error | 95% confidence interval for mean | Minimum | Maximum | ||
|---|---|---|---|---|---|---|---|---|---|
Lower bound | Upper bound | ||||||||
Pretest scores | GDA | 31 | 4.3548 | 1.37957 | .24778 | 3.8488 | 4.8609 | 2.00 | 7.00 |
CDA | 31 | 4.4194 | 1.40888 | .25304 | 3.9026 | 4.9361 | 2.00 | 6.00 | |
CG | 29 | 4.5517 | 1.32520 | .24608 | 4.0476 | 5.0558 | 2.00 | 6.00 | |
Total | 91 | 4.4396 | 1.35981 | .14255 | 4.1564 | 4.7228 | 2.00 | 7.00 | |
Posttest scores | GDA | 31 | 11.1935 | 3.75428 | .67429 | 9.8165 | 12.5706 | 4.00 | 17.00 |
CDA | 31 | 12.0968 | 4.19011 | .75257 | 10.5598 | 13.6337 | 5.00 | 20.00 | |
CG | 29 | 4.3448 | 1.31681 | .24453 | 3.8439 | 4.8457 | 2.00 | 6.00 | |
Total | 91 | 9.3187 | 4.78860 | .50198 | 8.3214 | 10.3160 | 2.00 | 20.00 | |