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An Item Analysis Splits the "Upper" and "Lower" Groups into the Top

Question 7

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An item analysis splits the "Upper" and "Lower" groups into the top and bottom 50% of cases. Here are the item statistics for four items (21, 22, 23, and 24) .
An item analysis splits the Upper and Lower groups into the top and bottom 50% of cases. Here are the item statistics for four items (21, 22, 23, and 24) . Which is the most difficult item? A) 21 B) 22 C) 23 D) 24 Which is the most difficult item?


A) 21
B) 22
C) 23
D) 24

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