STATISTICAL TECHNIQUES AND TOOLS
CORRELATION COEFFICIENT COEFFICIENT OF DETERMINATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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If two variables, x and y, have a very strong linear relationship, then
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there is evidence that x causes a change in y.
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there is evidence that y causes a change in x.
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there might not be any causal relationship between x and y.
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None of these alternatives is correct.
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Explanation:
Detailed explanation-1: -A linear equation in two variables can be described as a linear relationship between x and y, that is, two variables in which the value of one of them (usually y) depends on the value of the other one (usually x). In this case, x is the independent variable, and y depends on it, so y is called the dependent variable.
Detailed explanation-2: -If r = 1, then there is a perfect positive linear relationship between x and y. If r = 0, then there is no linear relationship between x and y.
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