The range of p (difficulty index) on a set of items comprising a four -option multiple-choice test should be approximately
A) -1.00 to 1.00.
B) .00 to 1.00.
C) .10 to .90.
D) .40 to .80.

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The Answer of The range of p (difficulty index) on a set of items comprising a four -option multiple-choice test should be approximately
A) -1.00 to 1.00.
B) .00 to 1.00.
C) .10 to .90.
D) .40 to .80.

The Range of P (Difficulty Index) on a Set of Items