Question 2 (a) Explain briefly what is meant by linear correlation between two variables. Use a graph if necessary. (4) (b) If the data below represent the number of years of study and the wage earned by a sample of 10 women, calculate: i. the covariance of the two variables; (2) ii. the coefficients of variation of the two variables; and (2) iii. the variances of the two variables. (2) [10] Person Years of study Wage (R'000s) 1 2 3 4 5 6 7 8 9 10 12 17 14 15 13 10 14 15 16 11 15 32 20 24 21 14 26 25 28 16