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Center and spread from any displayTechnique

Technique

Center and spread from any display

Unpack any display into values, then measure

3 min 3 steps

A frequency table packs a whole class into five rows. I used to pack a whole pencil case into one sleeve, so I respect the efficiency.

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The first step is free. A free account opens the rest.

Calls on

Measures of center and spreadFactKnow what each measure counts and what moves it

Used by

Reason about center and spreadTacticMeans follow the total, medians follow the middle
Sample estimates and margin of errorTacticScale up the sample, then read the margin as a range