Use these AP Statistics notes to teach or as an AP Statistics review of all 7 SAMPLING METHODS : simple random sample (SRS), stratified sample, cluster sample, systematic sample, convenience sample, multistage sample, & census. Students will learn to distinguish between the 7 sample methods and practice applying them in different contexts. Other vocabulary terms defined in this lesson include population, sample, representative sample, sample frame, sample variability, strata/stratum, & c