A doctor in one private clinic is interested to know whether the patient's blood pressure is related to body weight. He collected 15 samples and obtained the data as in Table 2.

Table 2:

Patient:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Blood Pressure:

105 115 116 117 112 121 121 110 110 114 114 115 114 106 125

Weight (kg):

85.4 94.2 95.3 94.7 89.4 99.5 99.8 90.9 89.2 92.7 94.4 94.1 91.6 87.1 101.3

Answer the following questions without using output from any software.

a) Calculate the Pearson correlation coefficient between blood pressure and weight. b) Test whether there exists correlation between blood pressure and weight using level of significance 0.05.

c) Construct a regression equation between blood pressure and weight using Least Squares method.

d) Based on your answer in (a)-(c), comment the overall relationship between blood pressure and weight.