Question

1. A certain university had a high demand to increase student enrollments, but they did not have an adequate number of classrooms. Therefore, they decided to offer at Stat 252 night class at 10 pm –1:00 am. Guess what – the attendance was terrible. In this class of 250 students, many of the students never attended and many of those who attended dosed through most of the lectures. Below are the marks of a random sample of 18 students from this class, along with graphs illustrating the distribution of marks. Suppose you want to test whether the distribution of marks of this night class is below the distribution of day classes, which had a median mark of 80%

   - Distribution of marks of a random sample of 18 students in the night class = 53, 47, 92, 97, 88, 35, 31, 75, 89, 47, 44, 91, 82, 33, 47, 60, 72, 88,

2. At the 5% significance level, perform the test you selected in part (a). Show all steps

   - Selected the Wilcoxon Signed rank-test; Sum of positive ranks = 202

Answer 1

here mist of the difference have negative sign so the median of the distribution is less than 80.