Basic Statistics - Old Questions

2. Define regression. From the following table, compute the line of regression for estimating blood pressure:

Blood pressure Y	147	125	160	118	149	128
Age in years X	56	42	72	36	63	47

(i) Fit a regression equation that best describes the above data.
(ii) Estimate the blood pressure when age is 50 years.
(iii) Interpret the regression coefficient. [10]