Answer the following questions (Alternatives are to be noted): If V(x) = 9, V(y) = 4 and V(x - y) = V(x), find the correlation coefficient between x & y.

Answer the following questions (Alternatives are to be noted) : Explain M.V.U.E.

Answer the following questions (Alternatives are to be noted): If the relation between two variables x and y is y = 2x + 3 , find the correlation coefficient between x and y.

Answer the following questions (Alternatives are to be noted): If u = 2x + 5 and v = - 3y + 1 and regression coefficient of y on x is-12, determine the regression coefficient of v on u.

Answer the following questions : (Alternatives are to be noted): If r_(xy) = 0.8 , find r_(uv) where u = x+5 , v = 3 - y .

Answer the following questions (Alternatives are to be noted): If r be the correlation coefficient between two variables x and y then prove that -1 le r le1 .

Answer the following questions in short: If the correlation coefficient between x and y is 0.5, find the correlation coefficient between 5x and -4y.

Answer the following questions in short: If the correlation coefficient between x and y is 0.5, find the correlation coefficient between 5x and -4y.

Answer the following questions (Alternatives are to be noted): If two lines of regression are given by 2x + 3y = 13 and 3x + 4y = 18, find the sum of A. M. s of x and y.

Answer the following questions: If the correlation coefficient between x and y be 0.8, determine the correlation coefficient between x and 5 - 3y.

Answer the following questions (Alternatives are to be noted): Derive spearman's rank correlation coefficient.