Glossary // Glossary term Technical
Confidence interval
A range of values computed from data that expresses the precision of an estimate, such as an effect size. A 95% interval is produced by a procedure that, over many repetitions, would contain the true value 95% of the time; it does not mean there is a 95% probability that the true value lies in one particular interval. Wide intervals signal imprecise estimates, and reporting intervals alongside effect sizes is widely recommended over relying on significance tests alone. How one could reason about recording a catharsis-like change of state: signals, features, inference and context, baselines, self-report, error costs and ethics, and why every step stays uncertain. Nothing on this site measures anyone. Every public claim on this site with its type, evidence level, confidence, sources and review date, and an appraisal of each reference. How claims are graded, how art is kept apart from evidence, and how to report a problem. The works the definition rests on, with the level of evidence each was appraised at. (2014). The new statistics: Why and how. doi:10.1177/0956797613504966 Supports recommendations to report effect sizes with confidence intervals rather than rely on null-hypothesis significance testing. A position shared by many methodologists but not universally; it is guidance, not a test.Where the site uses it
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