STATISTICAL TECHNIQUES AND TOOLS
CORRELATION COEFFICIENT COEFFICIENT OF DETERMINATION
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Question
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If the correlation coefficient r between blood pressure and weight is 0.7,
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it is a moderate positive relationship.
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49% of the variation in weight can be explained by the variation in the blood pressure.
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51% of the variation in weight is due to other factors than the blood pressure.
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All of the above.
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Explanation:
Detailed explanation-1: -Values between 0.7 and 1.0 (−0.7 and −1.0) indicate a strong positive (negative) linear relationship through a firm linear rule. It is the correlation coefficient between the observed and modelled (predicted) data values. It can increase as the number of predictor variables in the model increases; it does not decrease.
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