Lessons for S.IC.B.3
Blocking: randomized block and matched pairs designsGrouping similar units first so a known source of variation does not hide the treatment effect.Lesson
Completely randomized design and replicationAssigning every unit to a treatment purely at random, with no grouping first.Lesson
Experimental designControl, randomization, replication, blocking.Lesson
Observational studies and experimentsWatching versus assigning, and what each can and cannot conclude.Lesson
Random assignment and confoundingUsing chance to decide which unit gets which treatment, so the groups start out alike.Lesson
Printable Worksheets
Blocking: randomized block and matched pairs designs worksheet (PDF)Printable worksheet with answer keyPreview
Completely randomized design and replication worksheet (PDF)Printable worksheet with answer keyPreview
Observational studies and experiments worksheet (PDF)Printable worksheet with answer keyPreview
Random assignment and confounding worksheet (PDF)Printable worksheet with answer keyPreview