help as soon as possible

Some college professors make bound lecture notes available to their classes in an effort to improve teaching effectiveness. In a study, two groups of students were surveyed 86 students enrolled in a promotional strategy class that required the purchase of lecture notes and 35 students enrolled in a sales/retailing elective that did not offer lecture notes. At the end of the semester, students were asked to respond to the statement, \"Having a copy of the lecture notes was (would be) helpful in understanding the material.\" Responses were measured on a 9- point semantic difference scale, where 1=strongly disagree and 9=strongly agree. Purchased Lecture Notes Did Not Purchase Lecture Notes n1 2 86 n2 2 35 :51 = 8.35 932 = 7.80 Q2.1 1 Point Do the samples provide sufficient evidence to conclude that there is a difference in the mean responses of the two groups of students? Find the value of the test statistic O 2.19 O 1.77 O 1.64 O 2.01 Q2.2 1 Point Do the samples provide sufficient evidence to conclude that there is a difference in the mean responses of the two groups of students if we test at a = 0.01? What about a = 0.1? O We can reject Ho at a = 0.1 and at a = 0.01 O We can reject Ho at a = 0.1 but not at a = 0.01 O We can reject Ho at a = 0.01 but not at a = 0.1 O We can not reject Ho neither at a = 0.1 nor at a = 0.01