Interpreting item difficulty and item discrimination in objective test items are clearly discussed in your learning material.
a) The following is an item analysis data. The data indicate the number of students choosing each alternative. The correct answer is marked by (*). Review the data and determine p and d and evaluate the effectiveness of distractors
Item Number Alternatives
A B C D Omit
al) Upper 27% 8* 5 6 8 0
Lower 27% 2 9 8 8 0
a2) Upper 27% 13 2 10* 2 0
Lower 27% 5 1 9* 12 0
a3) Upper 27% 2 20* 3 2 0
Lower 27% 11 2* 8 6 0
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