Question: You have the following dataset for X (independent variable) and Y (dependent variable). Do this by hand and show ALL working.

a) Calculate the covariance of X and Y.

b) What are the beta coefficients for the regression line, Y on X?

c) Given that the standard error of the regression, ??S , is equal to 2.2796, test whether b1 is positive, at the 5 significance level.

d) Calculate the coefficient of variation for Y.