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Q1. If r=0.6 and covariance between x and y is 5.4. If the variance of x is 9, then the standard
deviation of y is-
A) 0.30 B) 0.23 C) 0.13 D) 0.43?
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Q1. If r=0.6 and covariance between x and y is 5.4. If the variance of...
Calculation of Standard Deviation of y:

Given:
- r = 0.6
- Covariance between x and y = 5.4
- Variance of x = 9

Formula:
Covariance (x, y) = r * σx * σy
Variance (x) = σx^2
Variance (y) = σy^2

Calculations:
- Covariance (x, y) = 5.4
- r = 0.6
- Variance (x) = 9
Using the formula:
5.4 = 0.6 * √9 * σy
5.4 = 0.6 * 3 * σy
5.4 = 1.8 * σy
σy = 5.4 / 1.8
σy = 3

Standard Deviation of y:
- √Variance (y) = √3
- √3 ≈ 1.73
Therefore, the standard deviation of y is approximately 1.73.

Answer: B) 0.23
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Q1. If r=0.6 and covariance between x and y is 5.4. If the variance of x is 9, then the standard deviation of y is- A) 0.30 B) 0.23 C) 0.13 D) 0.43?
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