which residuals are normal distributed? what is the t value of the residual standard error calculate residual standard error of iris which term does the iris coefficient represent? a. estimate standard error b. estimate ct d what does the t value of iris mean what is the residual standard error what the t value in the coefficient mean? ___________ is the mean of the residual standard error of a linear model. r. what does the t value in iris mean what do res mean in t value what does residual standard error mean in r r what does residual standard error mean what is the t value of iris what is residual standard error in r what does the t value in the coefficients mean in a regression analysis? r calculate standard error t value what is the residual standard error in r lm definition for r which of the following is used to calculate a residual standard error? what does the t value represent with the residuals