Suppose we have two groups of students, those who go for tutoring help and those who do not. The following is the mathematics test results from these two groups of students. with tutor help without tutor help (a) Test for the equality of variances of mathematics test results from the students with and without tutoring help at a = 0.1 (b) Test whether there is difference in the mean mathematics test results for the students with and without tutoring help at 2% significance level. (c) Find the 95% confidence interval for the difference between two groups' average mathematics test results. (?? Marks)