The correlation coefficient for two real-valued attributes is -0.85. What does this value tell you?

[amp_mcq option1=”the attributes are not linearly related.” option2=”as the value of one attribute increases the value of the second attribute also increases” option3=”as the value of one attribute decreases the value of the second attribute increases” option4=”the attributes show a linear relationship” correct=”option3″]

The correct answer is: C. as the value of one attribute decreases the value of the second attribute increases.

A correlation coefficient is a measure of the strength and direction of the linear relationship between two variables. A correlation coefficient of -0.85 indicates a strong negative linear relationship between the two variables. This means that as the value of one variable increases, the value of the other variable decreases.

Option A is incorrect because a correlation coefficient of -0.85 indicates a strong linear relationship, not no relationship.

Option B is incorrect because a correlation coefficient of -0.85 indicates a negative linear relationship, not a positive linear relationship.

Option D is incorrect because a correlation coefficient of -0.85 indicates a strong negative linear relationship, not a linear relationship.

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