Multiple Choice
Assume that of 55 persons who take a test, 10 of the 15 people falling in the upper group on total test score and 5 of the 15 falling in the lower group on total test score pass a given item. What is the item discrimination index?
A) .17
B) .33
C) .50
D) 1.00
Correct Answer:
Verified
Correct Answer:
Verified
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