{"id":"https://openalex.org/keywords/sample-size-calculation","display_name":"sample size determination","description":"Sample size determination is the statistical process of choosing how many observations are needed for a study or estimation procedure.","display_name_alternatives":["sample size calculation","sample size estimation","sample size planning","determination of sample size","calculating sample size","sample size calculations","sample size selection"],"ids":{"openalex":"https://openalex.org/keywords/sample-size-calculation","wikidata":"https://www.wikidata.org/wiki/Q2564360"},"primary_topic":{"id":"https://openalex.org/T11235","display_name":"Statistical Methods in Clinical Trials","score":0.2074,"subfield":{"id":"https://openalex.org/subfields/2613","display_name":"Statistics and Probability"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11235","display_name":"Statistical Methods in Clinical Trials","score":0.2074,"subfield":{"id":"https://openalex.org/subfields/2613","display_name":"Statistics and Probability"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"works_count":30527,"cited_by_count":1061931,"works_api_url":"https://api.openalex.org/works?filter=keywords.id:keywords/sample-size-calculation","updated_date":"2026-10-16T04:06:51","created_date":"2026-09-30T00:00:00"}