I group | J group | Difference between averages | Standard error | Meaningfulness level | |
Diploma | Junior diploma | 1.93 | 0.79 | 0.02 | |
Junior college | B. A and higher | 3.24 | 0.99 | 0.001 | |
| B. A and higher | 1.31 | 0.86 | 0.13 | |