Table 2.
Descriptive statistics of the examinations
| Year | Phase | Students | Alpha cronbach | Difficulty Index Mean (SD) |
Discrimination Mean (SD) |
Flawed items N (%) |
|---|---|---|---|---|---|---|
| N | 0.62 (0.21) | 0.34 (0.16) | 446 (55.8) | |||
| 2008 | 1 | 217 | 0.883 | 0.57 (0.19) | 0.33 (0.14) | 71 |
| 2008 | 2 | 123 | 0.864 | 0.63 (0.20) | 0.32 (0.17) | 59 |
| 2009 | 1 | 208 | 0.877 | 0.66 (0.20) | 0.34 (0.14) | 59 |
| 2009 | 2 | 113 | 0.892 | 0.65 (0.21) | 0.37 (0.16) | 56 |
| 2010 | 1 | 192 | 0.859 | 0.65 (0.21) | 0.30 (0.14) | 60 |
| 2010 | 2 | 116 | 0.868 | 0.59 (0.21) | 0.32 (0.15) | 54 |
| 2011 | 1 | 243 | 0.890 | 0.62 (0.22) | 0.37 (0.17) | 45 |
| 2011 | 2 | 48 | 0.897 | 0.59 (0.20) | 0.37 (0.19) | 42 |