Item Difficulty and Item Discrimination Data

 

Items 1-10 are multiple choice items with 4 options each and therefore a 25% chance level responding. Item 11 is a written response item with 0 as the chance level responding.
For a possible 8 points of extra credit answer the following questions:
1) What are the worst items on this quiz? Why are they the worst given the item difficulty and discrimination information?
2) What are the best items on this quiz? Why are they the best given the item difficulty and discrimination information?

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