{"id":605,"date":"2024-08-29T10:08:19","date_gmt":"2024-08-29T08:08:19","guid":{"rendered":"https:\/\/site.ellistat.com\/?p=605"},"modified":"2024-10-23T15:02:07","modified_gmt":"2024-10-23T13:02:07","slug":"la-prova-e-fisher-lorigine-dei-piani-dellesperienza","status":"publish","type":"post","link":"https:\/\/ellistat.com\/it\/la-preuve-le-the-et-fisher-lorigine-des-plans-dexperience\/","title":{"rendered":"Prova, t\u00e8 e Fisher: l'origine del disegno sperimentale"},"content":{"rendered":"

Nel disegno degli esperimenti in statistica, la signora che beve il t\u00e8 \u00e8 un esperimento casuale riportato da Ronald Fisher nel suo libro del 1935 The Design of Experiments.<\/p>\n\n\n\n

Un giorno, Ronald Aylmer Fisher<\/a> (l'inventore del disegno sperimentale) ha assistito a una scena in cui una signora si \u00e8 indignata:<\/p>\n\n\n\n

Gli \u00e8 stato servito prima il t\u00e8 con il latte!<\/p>\n\n\n\n

Fisher, divertito, dubitava per\u00f2 che l'ordine di aggiunta del t\u00e8 e del latte potesse influire sul gusto della bevanda. La signora disse che sentiva la differenza.<\/p>\n\n\n\n

Fisher, quindi, lo mise in discussione. Egli ide\u00f2 un test che \u00e8 tuttora noto come test esatto di Fisher. \u00c8 sufficiente confrontare 4 tazze per ogni configurazione. Se tutte le 8 tazze vengono riconosciute, la differenza \u00e8 statisticamente provata.<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

La signora non ha avuto problemi a riconoscere l'ordine in cui sono state preparate molte pi\u00f9 tazze di quelle necessarie per dimostrare la sua affermazione. La descrizione di Fisher nel suo libro \u00e8 lunga meno di 10 pagine e si distingue per la sua semplicit\u00e0 e completezza in termini di terminologia, calcoli e disegno sperimentale.<\/p>\n\n\n\n

Anche se la Y non \u00e8 misurabile, possiamo facilmente fornire una prova statistica della differenza. Il Six Sigma a volte \u00e8 cos\u00ec semplice! Per saperne di pi\u00f9 sulla progettazione sperimentale, potete seguire il nostro sito formazione<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"

Dans la conception des exp\u00e9riences en statistique, la dame d\u00e9gustant du th\u00e9 est une exp\u00e9rience al\u00e9atoire rapport\u00e9e par Ronald Fisher dans son livre The Design of Experiments (Les Plans d\u2019Exp\u00e9rience) de 1935. 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