a) Obtain the equations of the lines of regression of Y on X from the following data.
X : 12 18 24 30 36 42 48
Y : 5.27 5.68 6.25 7.21 8.02 8.71 8.42
the most probable value of Y, when X = 40. (7 marks)
b) The following table gives the ages and blood pressure of 9 women.
Age(X): 56 42 36 47 49 42 60 72 63
Blood Pressure(Y) 147 125 118 128 145 140 155 160 149
i) Find the correlation coefficient between X and Y. (5 marks)
ii) Determine the least square regression equation of Y on X. (4 marks)
iii) Estimate the blood pressure of a woman whose age is 45 years. (4 marks)
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