Williams Blockification

This card sort, inspired by an activity from Penny Williams of Richmond Hill, GA, helps students to discern the differences between Stratify vs. Block, Strata vs. Cluster, Factor vs. Treatment, Non-Response vs. Under coverage, Non-Response Bias vs. Response Bias, Random Assignment vs. Random Selection, Inference about population vs. Inference about cause & effect.

By Cathy Lichodziejewski