TN Algebra 2 Standard A2.S.IC.A.1
Every single dot has an equal chance. Pure luck.
Split into rows, then pick some from every row.
Split into columns, then pick whole columns.
Pick a starting point, then every 6th dot.
Only picking dots in the top corner. High Bias.
Clear the board and start over.
The Logic: "Some from All."
Split population into groups (strata), then pick a few random people from every single group. Use this to ensure fairness.
The Logic: "All from Some."
Split population into groups (clusters), pick a few groups randomly, and survey everyone in those groups. Use this to save time.
The Logic: "Every nth person."
Pick a random starting point, then pick every 5th, 10th, or 100th person. Common in factory quality control.
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