(2 points) the least squares method requires that the variance ?2??2 of the error variable ? is a constant no matter what the value of x is. when this requirement is violated, the condition is called: a. homoscedasticity b. non-independence of ? c. heteroscedasticity d. influential observation in regression analysis, the coefficient of determination r2r2 measures the amount of variation in y that is: a. caused by variation in x b. unexplained by variation in x c. explained by variation in x d. both a and b are correct answers help entering answers Get the answer
Category: literature | Author: Selma Yafa