CQQ The exercises are based on the following sample data obtained from different second-year medical students who took blood pressure measurements of the same person (based on data from Marc Triola, MD). S y s t o l i c D i a s t o l i c Repeat the preceding exercise assuming that the linear correlation coefficient is ?r = 0.989.
Solution 4 CQQ Step 1 : The given data is based on the second year medical students who took blood pressure measurements of the same person Following are the steps to analyze correlation and regression from Stat Disk . Enter the dataset in stat disk AnalysisCorrelation and regression. . Choose level of significance evaluate By using Minitab . Enter the dataset in Mini tab Statisticsregression regression . Double click on response variable and predictor variable OK Step 2 : The value of correlation r = 0.9890 The regression line is given by D= -1.99 + 0.698 x S Let , S = Systolic blood pressure which is the independent variable, D = Predicted value of the diastolic blood pressure which is dependent. Step 4 : To find prediction value D= -1.99 + 0.698 x 125 = -1.99 + 87.25 = 85.26 The predicted diastolic reading is 85.26mm