Scheaffer

Activity-Based Statistics: Student Guide (Textbooks in Mathematical Sciences)

By Scheaffer, Richard L., Witmer, Jeffrey, Watkins, Ann, Gnanadesikan, Mrudulla

Elementary Survey Sampling (Duxbury Advanced)

By Scheaffer, Richard L., Mendenhall III, WILLIAM

Elementary Survey Sampling

By Scheaffer, R.L., Mendenhall, W., et al