The data show systolic and diastollic blood pressure of certam people. Find the

Question

The data show systolic and diastollic blood pressure of certam people. Find the regression equation, letting the sysilic reading be the indeperent)arable Fid best predicted diastolic pressure for a pen on with a systolic read ng of 139 Is the predet dvabe close to 938,wh hwas thach d dash le n ai ?Use a significance level of 0.05 130 131 122 131 119 1S 12123 a 9371679859100 92 astolic Click the icon to view the cnitical values of the Pearson correlation coefficient r What is the regression equation? yml 1+1 lx (Round to two decimal places as needed ) What is the best predicted dastolic pressure for a person with a systolic reading of 139n The best predicled dastolic pressure for a person with a systole reading of 139s Round to one decimal place as needed.) Is the predicted value close to 93.8 which was the actual dastolic reading? O A. The predicted value is very close to the actual diastolic reading

Explanation / Answer

After analysis we obatined the following coefficients :

So, we have the regression equation as :

y = - 105.57 + 1.49 x

Now we are given systolic reading of 139 which means x = 139

y = - 105.57 + 1.49 * 139

y = 101.54

The best predicted diastolic pressure for a person with a systolic reading of 139 is 101.54

Since, this value is not close to actual value 93.8

Correct option : D. The predicted value is not close to the actual diastolic reading.

Also, if we calculate the Correlation coefficient

r = 0.6167

Critical value = 0.707 (using the given table)

Since , The critical value = 0.707 > 0.6167 ( Calculated correlation coefficient ) , we can conclude that there is no significant correlation between Systolic blood pressure and diastolic blod pressure.

Intercept -105.57 independent variable 1.49

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