The ages (in years) of nine men and their systolic blood pressures (in millimetres of mercury) are given below.

Age

16

25

39

49

22

57

22

63

75

Systolic blood pressure

109

122

143

199

118

175

118

185

199

a)Name the dependent and independent variables[2 marks]

b)Calculate the correlation coefficient and interpret your results.[5 marks]

c)Calculate the rank difference correlation coefficient [6 marks]

d)Develop the regression equation for the data set.[5 marks]

e)Predict the blood pressure of a 50-year-old and a 70-year-old.[4 marks]

f)Discuss the usefulness of this information to Senior Citizens [4 marks]

Examine the assumptions for regression analysis?[4 marks]