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    103 102    94 75    74
Left Arm    177 170 146    143 144

The regression equation is y = ____+_____x. ​(Round to one decimal place as​ needed.)
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.
​(Round to one decimal place as​ needed.)

Answer 1

Solution:

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
The regression equation is: y = 68.7474 + 0.9738 x
here x = 80
=> y = 68.7474 + 0.9738(80) = 146.7 mm Hg.