Listed below are systolic blood pressure measurements (in mm Hg) obtained from t

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 85 mm Hg. Use a significance level of 0.05 78 145 101 100 92 Right Arm Left Arm 176 144 143 ?Click the icon to view the critical values of the Pearson correlation coefficient r The regression equation is y -IX. Round to one decimal place as needed.)

Explanation / Answer

> x <-c(101,100,92,77,78);x

[1] 101 100 92 77 78

> y <-c(176,171,144,143,145);y

[1] 176 171 144 143 145

> summary(lm(y~x))

Call:

lm(formula = y ~ x)

Residuals:

1 2 3 4 5

6.478 2.682 -14.689 2.366 3.162

Coefficients:

Estimate Std. Error t value Pr(>|t|)  

(Intercept) 47.9531 37.6313 1.274 0.2923  

x 1.2036 0.4172 2.885 0.0633 .

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Signif. codes:  

0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 9.67 on 3 degrees of freedom

Multiple R-squared: 0.7351, Adjusted R-squared: 0.6467

F-statistic: 8.323 on 1 and 3 DF, p-value: 0.06327

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