exportPattern("^[[:alpha:]]+")
 importFrom("stats", "cor", "dnorm", "glm", "lm", "pnorm", "qchisq", "qf", "complete.cases", "pchisq")
 importFrom("utils", "read.table", "tail", "write.table")
 importFrom("stats", "binomial", "fitted", "hatvalues", "var")
import(MASS)
