Question 4.? An analysis using the simple linear regression model based on 19 data points gave: 3a: =12.2 a.\" =l. sly =3.l (i) (a) Calculate t. {it} Test whether 13 is signieantl}.r different from zero. [4] {ii} (a) Calculate r. (11} Test whether p is signii'lasantlf,r different from zero. [4] (iii) Comment on the results to your tests from part (i) and (ii). [2] [Total l] Question 4.3 The sums of the squares of the errors in a regression analysis are found to be: SSaaa = 2:31 if = 6.4 35m = Egg _ g)? = 3.45 Find the eoet'eient of determination and explain what this represents. [2] Question 4.9 How would you transform the following models to linear form: {i} y; = a + ELIE + e; [2] (a; a = ash" [2] [ma 41