Mathematics · Educational Evaluation and Statistics
When the response of a test item is analyzed, it is found that 32 out of 40 students in the upper group and 14 out of 40 students in the lower group answered correctly. What is the item's discriminating power?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 10.80
- 20.35
- 30.45✓
- 40.58
Correct answer
0.45
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