A researcher was conducted to determine if systolic pressure is correlated to the age of women patients. Ten patients were randomly chosen and their blood pressure and age were taken as follows:

Patient No. 1 2 3 4 5 6 7 8 9 10

Age (x) 18 38 25 42 36 27 15 17 55 56

Systolic 90 110 105 110 115 120 120 110 130 140

Pressure (y)

A. Calculate the Pearson Product Moment Correlation Coefficient (r).

B. Is there any positive or negative correlation between the age and systolic pressure of the patients?

C. Compute the coefficient of determination (r^2)

D. Explain the result of the computed value of r^2 in 'C' above.