Given the regression lines X+2Y-5=0, 2X+3Y-8=0 and Var(X)=12, the value of Var(Y) is

A measure of linear association of a variable with a number of other variables is known as

The hypothesis for a specific known value of _p can be tested by

The range of simple correlation coefficient is

If _p is the simple correlation coefficient, the quantity _p² is known as

If a constant 50 is subtracted from each of the value of X and Y, the regression coefficient is