Margin-of-error calculator
Estimate worst-case sampling uncertainty and the simple-random-sample size for a target margin.
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Small utilities for better research decisions.
Calculator inputs remain in page memory and are not sent or written to site storage by this application. Assumptions and formulas are shown beside each result.
Field-size and cost planner
Expose how variants, markets, exclusive cells, quality exclusions, incidence, and completion assumptions affect field size and cost.
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