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 90 mm Hg. Use a significance level of 0.05.

Right Arm   Left Arm
102   176
101   171
95   147
80   144
80   145

The regression equation is

Answer 1

Using Excel we get, the regression equation is,

y-hat = 44.2691 + 1.2263x

We want to find, the best predicted systolic blood pressure in the left arm given that the systolic blood pressure in the right arm is 90 mm Hg.

y-hat = 44.2691 + (1.2263 * 90)

=> y-hat = 44.2691 + 110.367

=> y-hat = 154.6361

Therefore, best predicted value is 154.6361