Allied & ICAR Exam Bank • ALLIED_2753 NAT • 2 Marks

Section 1: Engineering Mathematics

Probability and Statistics

Subtopic: Correlation and regression analysis

Question Statement:

If the angle between the two regression lines is $90^\circ$, then the correlation coefficient $r$ is:

Answer Key:

0

Step-by-Step Solution & Explanation

When $r = 0$, the regression lines are perpendicular ($x = \bar{x}$ and $y = \bar{y}$), indicating zero linear correlation.
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