If the S.D. of X is3, what is the variance of (5-2X)?

If the relation between two variables y and x is x - 3y = 6 and S.D. of y is 2, then find the variance of ’x.

Two variables x and are related by y=3x+10 . If the S.D. of x is 4 what will be the S.D. of y ?

If coefficient of correlation is -0.6, standard deviation of x is 5 and variance of y is 16, then what is the co-variance of x and y?

If variance of a random variable x is 23, then what is the variance of 2x+10:(a)56 (b) 33 (c) 46 (d) 92

Two variables x and y are related by y=8+2x, if the S.D. of x is 3, then the S.D. of y will be-

Regression equation of y on x and y be x + 2y - 5 = 0 and 2x + 3y - 8 = 0 respectively and the variance of x is 12. find the variance of y.

Two variables x and y are related by y = 2-3x If the S.D of x be 1.5 the find the value of S.D of Y

Statement-1 : if the S.D. of a variable x is 6, then the S.D. of ax +b is |a| 6. Statement-2 : The variance and S.D. is not independent of change of scale

Statement-1 : if the S.D. of a variable x is 6, then the S.D. of ax +b is |a| 6. Statement-2 : The variance and S.D. is not independent of change of scale

The two lines of of regressions are x+2y-5=0 and 2x+3y-8=0 and the variance of x is 12. Find the variance of y and the coefficient of correlation.