STATISTICAL TECHNIQUES AND TOOLS
REGRESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The correlation coefficient measures ____
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whether there is a relationship between two variables.
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the strength of the relationship between two quantitative variables.
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whether a cause and effect relation exists between two variables.
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the strength of the linear relationship between two quantitative variables.
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Explanation:
Detailed explanation-1: -The correlation coefficient is a statistical measure of the strength of a linear relationship between two variables. Its values can range from-1 to 1. A correlation coefficient of-1 describes a perfect negative, or inverse, correlation, with values in one series rising as those in the other decline, and vice versa.
Detailed explanation-2: -The correlation coefficient is measured on a scale that varies from + 1 through 0 to – 1. Complete correlation between two variables is expressed by either + 1 or-1. When one variable increases as the other increases the correlation is positive; when one decreases as the other increases it is negative.
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