NDA 2018 Mathematics question
Consider the following statements : 1. If the correlation coefficient , then the two lines of regression are parallel to each other. 2. If the correlation coefficient , then the two lines of regression are perpendicular to each other. Which of the above statements is/are correct?
Answer: (D)
Solution
When both regression coefficients vanish and the lines are and , which are perpendicular (not parallel);
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