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?

Question

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?

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The Answer of 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?

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