Question

Listed below are systolic blood pressure measurements​ (in mm​ Hg) obtained from the same woman. Find the regression​ equation, letting the right arm blood pressure be the predictor​ (x) variable. Find the best predicted systolic blood pressure in the left arm given that the systolic blood pressure in the right arm is 80 mm Hg. Use a significance level of 0.05

Right Arm   Left Arm
103   175
102   169
95   149
76   150
76   148

The regression equation is

Given that the systolic blood pressure in the right arm is 80 mm​ Hg, the best predicted systolic blood pressure in the left arm is ? mm Hg.

Answer 1

x(Right arm)	y(left arm)	xy	x2	y2
103	175	18025	10609	30625
102	169	17238	10404	28561
95	149	14155	9025	22201
76	150	11400	5776	22500
76	148	11248	5776	21904
∑Xi=452	∑Yi=791	∑xiyi=72066	∑xi^2=41590	∑Yi^2=125791