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Effects of Visual Aids in Science Lessons in Some Selected Junior High Schools in Enchi in the Aowin Municipality
Open Journal of Educational Research
| Vol 3, Issue 3
Table 2. Distribution of paired sample t-test between the pre-test andpost-test results
| Paired sample statistics | r | Sig. | |||
| Scores | N | mean ± sd | St. Error | Pre & post test | Pre & post test |
| Pre-test | 245 | 5.20 ± 1.706 | 0.109 | 0.678 | < .0001 |
| Post-test | 245 | 12.56 ± 1.449 | 0.093 | ||
(t = -89.458, CI = -7.517, -7.193). r = correlation; sd = standard deviation.