Answer Happy

C. Jenny administers a multiple-choice test to her class and records the following data. [√ = 1 mark; X = 0] Item A Item B Item C Item D Item E Item F Item G Item H Item I Item J Item K Item L Item M Item N Item O Item P (ii) (iii) Ann √ √ X X X √ V Bhim Cath David Ela V V V X X V V √ V X X V V X X √ V √ V X X X X X X X X √ V V X √ √ √ V X √ X √ X √ V X X √ X X V V V V XXX √ X √ X X √ Students X √ √ X V X X X X X √ Fran Gap √ √ X √ √ V X √ X XIX X √ X X X X X √ X X -XXX Harry Isha Jack X X X √ V X X √ X X X √ X X X X X X X X √ X X X X X XX<XX X X √ XX √ XX X X X X X X √ X >x>>>×××× X V √ X X X X X X √ XX X X Perform an item analysis on items A, B, C and D. Explain what each item statistic means. (4 marks) Calculate the reliability of Jenny's test using the KR20 method. Explain what the reliability coefficient means. (3 marks) (split-half) Calculate the reliability index of the same test using the odd-even approach and comment on your answer. (3 marks)