Survey & research glossary

Plain-language definitions for the terms you'll run into designing and analyzing surveys.

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Z-score

A statistical value corresponding to a chosen confidence level (for example 1.96 for 95% confidence), used in the formulas for margin of error and sample size.

Use terms carefully

Clear definitions improve survey decisions

Terms such as anonymous, representative, significant, confidential, compliant, and secure carry specific expectations. Use them only when your survey method and implementation actually support the claim.

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