l The Amount of Scatter in the data The multiple standard error of the estimate (-)2 n-k-1 where 1; =each observed value of y in the data set i,=the value of y that would have been estimated from the regression equation n= the number of data values in the set k=the number of independent(a) variables measures the dispersion of the data points around the regression hyperplane o 2002 The Wadsworth GroupThe Amount of Scatter in the Data • The multiple standard error of the estimate where yi = each observed value of y in the data set = the value of y that would have been estimated from the regression equation n = the number of data values in the set k = the number of independent (x) variables measures the dispersion of the data points around the regression hyperplane. s e = (y i –y ˆ i )2  n–k–1 y ? i © 2002 The Wadsworth Group