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Table 18 Test-three analysis (number of students attempts = 89)

From: Evaluating the quality of the ontology-based auto-generated questions

Test statistics Value Description Desired values
Questions difficulty index average 0.564 Medium difficulty [0.3-0.9]
Questions discrimination index average 0.484 Satisfactory ≥0.3
Questions reliability average (point biserial coefficient) 0.399 Satisfactory ≥0.2
Test reliability index 0.604 Acceptable ≥0.7
Test discrimination power (Ferguson’s delta) 0.966 Satisfactory ≥0.9