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Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola
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10 CQQ The exercises are based on the following sample

Chapter 10, Problem 10CQQ

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QUESTION:

?10 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 If the sample data were to result in the scatterplot shown here, what is the value of the linear correlation coefficient r ? ??

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QUESTION:

?10 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 If the sample data were to result in the scatterplot shown here, what is the value of the linear correlation coefficient r ? ??

ANSWER:

Solution 10 CQQ Step 1 : The value of correlation coefficient must lies in between -1 to 1. If the value correlation is -1, then it is negatively correlated, if it is 1 then we can say that positively correlated, if the value is o then there is no correlation.

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