A teacher has implemented extra classes to help students who are weak in math courses. The following table reports the test scores of eight students before and after attending the additional classes. Markah ujian (dalam %) Test Marks (in %) Sebelum Selepas Before After Notes, given: d = Score After - Score Before 45 55 40 50 45 56 16 43 46 43 50 55 46 43 50 50 5. What is the hypothesis if the teacher wants to examine the effectiveness of extra classes in increasing the student's scores? = Answer : a) HO : Md =0 ; HI : Md > 0 6. Given the significant level of 5%, find the critical value for the test. = Answer : 5 7. Find the Wilcoxon test statistic, T+. (Write the numeric answer only) = Answer : 6 8. What is the test decision? = b) Reject null hypothesis because 22 is beyond the limit. Question 9. What is the conclusion? (Can choose more than one answers) i. There is no enough evidence to conclude that extra classes are effective. ii. There is enough evidence that extra classes are not effective. iii. There is enough evidence to conclude that extra classes are effective. iv. There is no enough evidence to conclude that extra classes are not effective