SHOW ALL CALCULATION 1. Below is the table showing the results of five multiple-choice items. Analyse each item and answer the following questions. Answer Distracters 150 students 75 75 Items Item difficulty Index discrimination A* Upper BC D Group Correct Lower Group Correct Q1 Q2 58 42 75 75 130 Q3 04 Q5 40 28 24 46 | 39 | 23 21 34 20 34 15 26 103 7 27 35 55 75 75 31 7 20 0 55 all) b(1) c1) d(1) el 1) a(2) b(2) c(2) d(2) e(2) Assuming A is the answer for all five questions. (1) What is the index of item difficulty for each item? Label as follows: a(1), b(1), (I), d(1) and e(1) (5 marks) (ii) What is the index of discriminating power for each item? Label as follows: a(2), b(2), c(2), d(2) and e(2) (5 marks) (iii) Assuming the ideal Item Difficulty is between 0.30 (40%) and 0.7 (70%) and the ideal Index of Discrimination is above 0.40 (40%). Write a short report on the effectiveness of the items above. (10 marks) SHOW ALL CALCULATION 1. Below is the table showing the results of five multiple-choice items. Analyse each item and answer the following questions. Answer Distracters 150 students 75 75 Items Item difficulty Index discrimination A* Upper BC D Group Correct Lower Group Correct Q1 Q2 58 42 75 75 130 Q3 04 Q5 40 28 24 46 | 39 | 23 21 34 20 34 15 26 103 7 27 35 55 75 75 31 7 20 0 55 all) b(1) c1) d(1) el 1) a(2) b(2) c(2) d(2) e(2) Assuming A is the answer for all five questions. (1) What is the index of item difficulty for each item? Label as follows: a(1), b(1), (I), d(1) and e(1) (5 marks) (ii) What is the index of discriminating power for each item? Label as follows: a(2), b(2), c(2), d(2) and e(2) (5 marks) (iii) Assuming the ideal Item Difficulty is between 0.30 (40%) and 0.7 (70%) and the ideal Index of Discrimination is above 0.40 (40%). Write a short report on the effectiveness of the items above. (10 marks)