The Questions for which statistics have been calculated will show the Statistics tab in the Observe Questions page. The Questions can be either be outside ExamDeveloper (i.e. imported), or can be from within the Project used in an Exam Form.
The Statistics tab has the following functions:
Select an Analysis Set for the Question.
Displays the Question Difficulty.
Displays Question Discrimination.
IRTa, IRTb, IRTc
Displays Questions IRT values.
Displays the number of Candidates who attempted the Question.
Options (A, B, C)
Displays the Answer Options of the Question.
Number of Candidates who selected the Answer Option.
The Score value for the Answer Option.
Discrimination value of Answer Option.
Be sure to click Save Changes to save any changes made.