Interactive Statistics Q.11.29

11.29 An instructor hypothesized that the students who earn a "C" or higher spend more hours per week outside of class on course work than those who receive a "D" or an "E." She collects the following data on two independent samples of students: Students with a "C" or higher: 9, 4, 7, 11, 1, 5, 3, 2, 1, 3. Students with a "D" or an "E": 3, 2, 0, 3, 2, 1, 4, 3. (a) State the appropriate hypotheses. (b) Using a significance level of 10%, perform the test. (c) State the assumptions underlying the test and perform an assessment of the assumptions