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9 cards from this deck
To see distribution clearly and identify trends.
Non-overlapping groups that data fits into exactly one.
Subtract lower boundary from upper boundary of a group.
Use inequalities, e.g., 150 ≤ h < 155.
Reveals trends and simplifies large datasets.
Over 12 groups can make patterns hard to see.
Class width = 155 − 150 = 5 cm
155≤h<160 — 155 included here (not in 150≤h<155)
145≤h<150,150≤h<155,155≤h<160,160≤h<170,170≤h<175
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