main effect analysis definition what is lm for main effect how to interpret a standard error in linear regression what is the coefficient of wt in a linear regression experiment what is hp:wt what is the main effect of linear regression what is the residuals of a p value of hp? what are linear regression main effect coefficients what is hp mean for linear regression when is main effect coefficient included in a linear regression? what is the difference between a main effect and an interaction? what is the coefficient of main effect in linear regression what is the wt of the main effect coefficient in a linear regression model how to interpret main effect coefficient when do you find the main effect coefficient for linear regression what is normal mean of hp what is the main effect coefficient in linear regression what is hp wt which term is interpreting the main effect coefficients in regression? when main effect is included in the interaction term of a linear regression model, it should be interpreted as