Re: [R] Problem with Slope.test function

Good evening! Thanks for your answer, but I don't really understand how to use vcov matrix for comarision of multiple regression line slopes... I've read this theme about using t-test in slope comarision: http://www.mail-archive.com/r-help@r-project.org/msg01713.html but how to use it in case o

Re: [R] Problem with Slope.test function

Hi Антон, my approach would be to use the estimated variance of the slope estimator. For your regression models m1 and m2 you can enter vcov(m1) vcov(m2) to get the variance-covariance matrix of m1 and m2. Then, assuming that the slope estimator is normal, you compute the p-value for slope_theo