We want to study if using the MyStatLab online homework system in Introductory Statistics influences grades achieved on

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We Want To Study If Using The Mystatlab Online Homework System In Introductory Statistics Influences Grades Achieved On 1 (78.84 KiB) Viewed 27 times

We want to study if using the MyStatLab online homework system in Introductory Statistics influences grades achieved on the Final. Group A of students was not using MyStatLab and group B was using MyStatLab. Assume independence between the group, random samples, and normally distributed grades for both groups with possibly different means but with the same variance (all parameters are unknown). Random samples of grades, m = n = 15 is taken from both groups. It is found that for students from group A, ū = 61, SSDx T)2 = = 861, and that for students from group B, 5 = 65, SSDy = 216, (yi – y)2 = 1172. Test whether there is a difference between the mean grades between the two groups. Perform the test at level of significance a = 0.05 by writing down the following: 16. (X; - = - • Ho and H • Test statistic and its observed value • Rejection region • Conclusion and interpretation in the context of the question.