Box Cox Transformation R. This assumption allows us to construct confidence intervals and conduct hypothesis tests. 1964 an analysis of transformations with discussion.
1964 an analysis of transformations with discussion. Journal of the royal statistical society b 26 211 252. The function invokes particular methods which depend on the class of the first argument.
Y λ yλ 1 λ if y 0.
This is a slight generalization of the boxcox function in the mass package that allows for families of transformations other than the box cox power family. We can then use profile likelihood techniques see here to derive the optimal transformation. The box cox procedure is similar in concept to the tukey ladder of power procedure described above. Box cox transformation is applied on the response variable.
