Table 2 Summary statistics of SQL-Tutor usage
From: Investigating the causal relationships between badges and learning outcomes in SQL-Tutor
| Â | Mean | SD |
|---|---|---|
Pretest % | 58.73 | 26.05 |
Active days | 3.39 | 2.69 |
Time-on-task (min) | 260 | 243 |
Solved problems | 37.47 | 34.74 |
Student level | 3.56 | 1.66 |
Posttest %, n = 28 | 69.05 | 25.9 |
Laboratory test% | 60.83 | 17.07 |