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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
101 177
100 172
92 142
78 144
79 146
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a. The regression equation is y^ = 42.9 + 1.3 x.
Given that the systolic blood pressure in the rigth arm is 90 mm HG, the best predicted systolic blood pressure in the left arm is ?