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Fifteen People in a Upper Group Consisting of 25 People

Question 16

Multiple Choice

Fifteen people in a upper group consisting of 25 people get an item right and 5 people in a lower group of 25 people get the item wrong. The item has a difficulty index of __________ and a discrimination index of __________.


A) .40, .20
B) .40, .40
C) .60, .20
D) .80, .40

Correct Answer:

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