Maharashtra State BoardHSC Commerce 12th Board Exam
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If for a bivariate data byx = – 1.2 and bxy = – 0.3 then find r. - Mathematics and Statistics

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Sum

If for a bivariate data byx = – 1.2 and bxy = – 0.3 then find r.

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Solution

Given, byx = – 1.2 and bxy = – 0.3

∴ r = `+-sqrt("b"_"XY" * "b"_"YX")`

`= +- sqrt((- 1.2)(- 0.3)) +- sqrt0.36 = +- 0.6`

Since bXY and bYX both are negative,

r is negative.

∴ r = - 0.6

Concept: Lines of Regression of X on Y and Y on X Or Equation of Line of Regression
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APPEARS IN

Balbharati Mathematics and Statistics 2 (Commerce) 12th Standard HSC Maharashtra State Board
Chapter 3 Linear Regression
Miscellaneous Exercise 3 | Q 4.06 | Page 54

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