Question

Given the regression equations:
3X +4Y = 44
5X +8Y = 80
Variance of X = 30
(1) Calculate Arithmetic mean, X and Y
(ii) Identify which one is X on Y and which one is Y on X
(iii) Calculate coefficient of correlation
(iv) Also find out oy
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Answer 1

Answer:

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Explanation:

I hope these help you

Answer 2

Answer:

The correct option is (iii) to Calculate the coefficient of correlation.

Explanation:

Calculate the Correlation Coefficient

The correlation coefficient is calculated by first determining the covariance of the variables and then dividing that quantity by the product of those variables’ standard deviations.

The correlation coefficient describes how one variable moves about another. A positive correlation indicates that the two move in the same direction, with a +1.0 correlation when they move in tandem. A negative correlation coefficient tells you that they instead move in opposite directions.

Hence, The correct option is (iii) to Calculate the coefficient of correlation.