Find out the correct answer out of the options given against each questions : If E (x) = 4 , var (x) = 9 , then E(x^2) equals to

Find out the correct answer out of the options given against each questions : (E-k)^2 is minimum when

Find out the correct answer out of the options given against each question:If E(T_1) = theta_1 + 2theta_2 , E(T_2) = theta_1 + theta_2 ,then unbiased estimator of theta_1 is-

Find out the correct answer out of the options given against each question: If u = 2x, v = - 7y and r_(uv)= 0.7 , then r_(xy) =

Find out the correct answer out of the options given against each question : If ax + by=1 is the relation between x and y (where a gt 0 and b gt 0 ), then correlation coefficient between x and y is-

Find out the correct answer out of the options given against each question: Rejectying H_0 , when it is true, is-

Find out the correct answer out of the options given against each questions : If x and y are random variables with expectations 3 and 5 respectively, then expectation of (3x - 5y + 16) is

Find out the correct answer out of the options given against each questions : In usual notation if bxy = -1.8 and byx = -0.2 , then r_(xy) is equal to

Find out the correct answer out of the options given against each question: If y denotes the dependent variable, x denotes the independent variable, m'denotes the slope and c denotes the intercept, then the equation of regression line is

Find out the correct answer out of the options given against each questions : If P (Type 1 error) = 0.2 and P(type II error) = 0.7, then power of the test is