An excerpt from a landmark clinical study in the early 50’s. The ages (in years) of 7 men and their ...
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An excerpt from a landmark clinical study in the early 50’s. The ages (in years) of 7 men and their systolic blood pressures are listed in the chart below. Age X: 16 25 45 49 64 70 39 Systolic Y: 109 122 132 199 185 199 143 a) Display a scatter plot of the values. b) By hand, calculate the correlation coefficient, r. Show your work. c) Decide if there is correlation or not. d) If correlation exists, then find the Regression Line. e) What would be the best estimated Systolic Blood pressure of a man 40 years of age? Show your work. f) What is the best estimated Systolic Blood pressure of a man 82 years old? Show your work.
8 years ago
(b) SS(x) = Σ(x^2) - [(Σx)^2 /n] = 15824 - (308^2 /7) = 2272 ...
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- Anexcerptfromalandmarkclinicalstudyintheearly.xls