Same chapter3 marksDifficulty: Medium
If r = 0.8, the standard deviation of x is 3 and that of y is 4, find the regression coefficient of y on x.
Linear Regression
3 marksDifficulty: Medium
What are the two lines of regression, and what does the point of their intersection represent?
Original Khojo Papers practice question — not from a past board paper.
Answer
The line of regression of y on x is used to estimate y from a given x, and the line of x on y to estimate x from a given y. The two lines intersect at the point whose coordinates are the means of x and y.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The two lines coincide when the correlation is perfect and are at right angles when it is zero.
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