Margin of error proportion

Client

Sampling error band for proportions.

Margin of error (proportion)

Wald-style margin from sample proportion and n at a chosen z—educational interval helper only. Processing runs in your browser—Toolcore does not need your paste for the core operation on this page.

Educational statistics only—confirm assumptions before production analysis.

How to use

Paste or type in the main field, then read the output below. Use Load example when available, or open the page with ?q= / ?qb= so tickets and agents share the same input.

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Nearby workflows on Toolcore

  • Math expression evaluator — Evaluate basic + − × ÷ arithmetic with parentheses in your browser—no variables. Useful when the same table needs another statistic.
  • CI proportion (lite) — Wald 95 percent CI for binomial proportion. Useful when the same table needs another statistic.
  • Sample size proportion — Approx n for proportion MOE at 95 percent. Useful when the same table needs another statistic.
  • Percentage calculator — Percent of a value, ratio to percent, and percent change—no server round-trip. Useful when the same table needs another statistic.

Common use cases

  • Margin of error proportion for quick local checks without uploading data.
  • Copy results into tickets, docs, or classroom notes.

Common mistakes to avoid

  • Unexpected input shape

    See the intro and how-to notes for accepted formats.

FAQ

Is processing local?

Yes—this runs entirely in your browser.

Agent prefill?

Use q or qb for the main text field when supported.

More tools

Related utilities you can open in another tab—mostly client-side.