1. What are the item parameter estimates of
students’ responses to JC mathematics paper 1 items
based on CTT model?
2. What are the item parameter estimates of students’ responses to JC mathematics paper 1 items
based on IRT (3PLM) model?
3. Is there any significant statistical comparability
between the CTT and IRT (3PLM) item parameter
estimates of students’ responses to JC mathematics
paper 1?