1.

a.

i.What is regression and what purpose does it serve?

ii.What is the 'method of inspection' for obtaining regression line and what place does it have compared with other methods?

iii.What is the meaning of the expression 'y on x' regression line?

b.For the following data;

X1 3 4 6 8 9 11 14

Y1 2 4 4 5 7 89

i.Draw a scattered diagram

ii.By inspection, fit a straight line to the data (ensuring it passes through the mean value)

iii.Find the equation of the regression line.