Calculate the Difficulty Index (p) and the Discrimination Index (D) for each question. REMINDER: you use the number of the students in both groups when calculating the difficulty index but the number of students in each group when calculating the discrimination index Item # Correct (Upper group) # Correct (Lower group) Difficulty (p) Discrimination (D) Question 1 4 2 .60 .40 Question 2 5 5 1.0 0 Question 3 4 4 .80 0 Question 4 4 1 .50 .60 Question 5 5 3 .80 .40 Question 6 5 3 .80 .40 Question 7 4 1 .50 .60 Question 8 4 2 .60 .40 Question 9 1 2 .30 -.20 Question 10 4 2 .60 .40