For three random variables X1, X2, and X3, the pairwise correlation coefficients are r12 = r13 = r23 = r. The multiple correlation coefficient square R1.232 is given by which expression?

If both regression coefficients of two variables are negative, the coefficient of correlation between them will be:

The coefficient of positive perfect correlation is:

Given below are two statements regarding regression coefficients: Statement I: The product of the two regression coefficients (bxy and byx) equals the coefficient of determination (r2) and cannot exceed 1. Statement II: The arithmetic mean of the two regression coefficients bxy + byx2 is greater than or equal to the correlation coefficient rxy. In light of the above statements, choose the correct answer: