General Studies · Correlation and Regression
When x and y represent the deviations of X and Y series from their respective arithmetic means, the covariance of X and Y (where N is the number of pairs of observations) is expressed as:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Covariance xy = √( ∑xy N )
- 2Covariance xy = 3 √( x∑y N )
- 3Covariance xy = 3 √( y∑x N )
- 4Covariance xy = ∑xy N✓
Correct answer
Covariance xy = ∑xy N
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