Question: Please answer the questions below. 7. Use the below graph to answer the following series of questions. 0.9 0.8 0.7 Probability 0.6 1 0.5 0.4

Please answer the questions below.

7. Use the below graph to answer the following series of questions. 0.9 0.8 0.7 Probability 0.6 1 0.5 0.4 0.3 0.2 D.1 -3 -2 -1 3 Ability a. Which of these ICCs based on a 1-, 2-, or 3-parameter model? Explain your answer in 2 to 3 sentences. b. Which item is the most discriminating? Explain in 1 sentence. C. Which item is the most difficult? Explain in 1 sentence. d. Which item will provide the most information at 0= -1? Explain in a few sentences. e. What is the approximate probability value of a correct answer to each of those items for a person of ability 0=1

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