{"uid":"cap_zGQjj3gSOiiZu1FwW5fnW","slug":"cohen-s-d-effect-size-calculator-62e8d794","name":"Cohen's d Effect Size Calculator","description":"Kostenlose Guides, Solo-Playbooks und Artikel zu KI, Automation und Side Hustles — für Menschen, die mit echten Systemen online Einkommen aufbauen wollen. Transparent finanziert über faire Affiliate-Links.","url":"https://kihustle.tech/agents/api/v1/effect-size-cohens-d?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"group_a":{"type":"array","items":{"type":"number"}},"group_b":{"type":"array","items":{"type":"number"}}}},"responseSchema":{"type":"json","example":{"result":"processed","status":"success"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm__CzpkBaM53rKju_sVUb9E","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes Cohen's d effect size statistic between two numeric groups to quantify the magnitude of difference","exampleAgentPrompt":"Can you calculate Cohen's d effect size between these two groups for me? Group A is [23, 25, 28, 30, 22] and Group B is [35, 38, 40, 33, 37].","exampleUseCases":[{"title":"A/B test effect size measurement","prompt":"I ran an A/B test on landing page conversion times. Group A (control) had values [12,15,14,13,16,11] and Group B (variant) had [9,10,8,11,9,10]. Can you calculate Cohen's d so I know if the difference is practically significant?"},{"title":"Clinical trial group comparison","prompt":"I need to compare pain scores between two patient groups in my study. Group A scores are [7,6,8,7,9,6,7] and Group B scores are [4,3,5,4,3,4,5]. What's the Cohen's d effect size?"},{"title":"Marketing campaign response analysis","prompt":"We ran two different email campaigns. Campaign A open rates were [22,25,20,23,24] and Campaign B were [30,32,28,31,33]. Calculate Cohen's d to tell me how large the practical difference is between them."}],"resultDescription":"Returns a JSON object with the computed Cohen's d value indicating the standardized mean difference between the two groups, along with a result status field confirming successful processing. Cohen's d values are interpreted as small (~0.2), medium (~0.5), or large (~0.8+) effect sizes.","failureModes":["Empty arrays for group_a or group_b may cause computation errors or division-by-zero","Non-numeric values in the arrays would fail schema validation","Very small sample sizes may produce unreliable effect size estimates","Malformed JSON body returns an error response","Network or server timeout on large arrays"],"whenToPreferThis":"Choose this endpoint when you need a quick, cheap ($0.002) programmatic computation of Cohen's d effect size without setting up a local statistics library. Ideal for agents doing automated experiment analysis, A/B test evaluation pipelines, or research workflows where effect size needs to be computed on the fly from raw numeric arrays.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T12:41:17.767Z","isFirstParty":false,"canonicalSlug":"cohen-s-d-effect-size-calculator-9c3ea74b"}