Technique

Build or complete a two-way table

Fill every blank, then find the condition's total

3 min 3 steps

Blank cells look like missing evidence, but the totals already know what's there. I used to count the class supply bins with the same nosy arithmetic.

Meet it
Run it
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The first step is free. A free account opens the rest.

Calls on

Signs and order of operationsFactKeep every sign and do the steps in order

Used by

Probability from tables and conditionsTacticShrink the total to the condition, then count
Evaluate study design and generalizationTacticAsk who was picked, then who picked the groups