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Sample estimates and margin of errorTactic

Tactic

Sample estimates and margin of error

Scale up the sample, then read the margin as a range

9 min 6 stepsGraded practice at the end

A survey can't give you the exact answer, only a plausible range. My answers to "Where were you fourth period?" worked the same way.

Meet it
Spot it
Run it
Dodge the traps
Play with it
Prove it

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

Calls on

Solve a proportionTechniqueCross-multiply, or scale one fraction into the other
Percent to factor and percent changeTechniqueWrite any percent change as a single factor
Center and spread from any displayTechniqueUnpack any display into values, then measure
Margin of error and sample sizeFactMore random data narrows the plausible range