QQuestionMathematics
QuestionMathematics
"Which of the following is not a possible r-value?
A. 0.6
B. 0.3
C. - 1.3
D. - 0.6
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Answer
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Step 1:Let's solve this step by step:
Step 2:: Understand the r-value (correlation coefficient)
The correlation coefficient (r-value) is a statistical measure that describes the strength and direction of a linear relationship between two variables.
Step 3:: Recall the properties of r-values
- $$r = +1$$ indicates a perfect positive linear relationship
- r-values always range from - 1 to + 1
Step 4:: Evaluate each option
- Falls within the range $$[-1, 1]
- This is a valid r-value (positive correlation) - This is a valid r-value (weak positive correlation) - This is NOT a valid r-value - This is a valid r-value (moderate negative correlation)
Final Answer
C. - 1.3 is not a possible r-value because it falls outside the valid range of [- 1, 1].
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