Author note — to cover

Group continuous (and wide-ranging discrete) data into classes written with inequality notation, exhaustive and non-overlapping; place given values into classes and choose sensible equal widths. Include reading frequencies and totals back out. Charts from these tables are the polygon and histogram pages; the estimated mean is on Averages and spread. Both tiers. (S2, S4)

• Fluency — direct questions on grouped frequency tables, limited to this lesson's stated scope (4 questions).
• Application — use the same skill in unfamiliar or contextual questions without introducing a later method (4 questions).
• Check — questions built around the exclusions and likely misconceptions named in the lesson brief (4 questions).