Question 3 a) Compute a m for each independent variable separately. Interpret the results obtain. {20 marks} b) Consider evaluating whether or not a linear relationship exists between the independent and dependent variable. Using the rtest for testing the existence of a linear relationship by two tail test of correlation coefcient {Manual working 011159 Question 4 Obtain and interpret polygon/histogram/line chart graph for each variable using excel only. (12 marks)