Table 4 Descriptive analysis of students who took the WISC-IV test: comparisons between different Characteristics of students
| Â | Overall | Students who did not take the Wechsler test | Students taking the Wechsler test | Differences | |||||
|---|---|---|---|---|---|---|---|---|---|
|  | N | Mean | N | Mean | N | Mean | Difference in mean | P-value | Effect size (Cohen’s d) |
| Â | (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) |
Student age | 5660 | 12.917 | 5188 | 12.914 | 472 | 12.948 | -0.034 | 0.457 | -0.036 |
Student gender | 5660 | .499 | 5188 | 0.499 | 472 | 0.504 | -0.005 | 0.829 | -0.010 |
Left-behind child status | 5660 | .525 | 5188 | 0.526 | 472 | 0.508 | 0.018 | 0.465 | 0.035 |
Father's education level | 5660 | .359 | 5188 | 0.359 | 472 | 0.360 | -0.001 | 0.965 | -0.002 |
Mather's education level | 5660 | .213 | 5188 | 0.212 | 472 | 0.225 | -0.013 | 0.510 | -0.032 |
Family asset value | 5660 | -.001 | 5188 | 0.003 | 472 | -0.044 | 0.047 | 0.366 | 0.043 |
Math scores of 2015 | 5660 | -.112 | 5188 | -0.110 | 472 | -0.139 | 0.029 | 0.529 | 0.030 |