{"id":4625,"date":"2026-08-12T15:44:20","date_gmt":"2026-08-12T13:44:20","guid":{"rendered":"https:\/\/ellistat.com\/?post_type=guide-dutilisateur&#038;p=4625"},"modified":"2026-08-12T15:44:20","modified_gmt":"2026-08-12T13:44:20","slug":"preparare-i-dati","status":"publish","type":"guide-dutilisateur","link":"https:\/\/ellistat.com\/it\/guide-dutilisateur\/preparer-les-donnees\/","title":{"rendered":"Preparare i dati"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Le caratteristiche derivano dalla&nbsp;<strong>tabella<\/strong>&nbsp;del progetto. Il selettore nella parte superiore della pagina consente di scegliere quelle da esaminare.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Due concetti sono fondamentali per la lettura e vanno compresi prima di tutto:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Il campione<\/strong>\u00a0raggruppa le misurazioni effettuate insieme o un sottogruppo razionale. \u00c8 proprio questo che sta alla base delle carte di controllo.<\/li>\n\n\n\n<li><strong>La prova<\/strong>\u00a0distingue diverse misure all\u2019interno dello stesso campione.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Questa suddivisione determina il calcolo della dispersione\u00a0<strong>a breve termine<\/strong>, quella che caratterizza un singolo campione, in contrapposizione alla dispersione complessiva, che comprende le variazioni da un campione all\u2019altro. \u00c8 proprio da qui che deriva l\u2019intera differenza tra Cp e Pp (vedi allegato).<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u26a0\ufe0f Una suddivisione arbitraria in campioni distorce questa separazione. Raggruppare misurazioni che non sono state effettuate contemporaneamente aumenta la dispersione a breve termine e nasconde le variazioni.<\/p>\n<\/blockquote>","protected":false},"featured_media":0,"menu_order":20,"template":"","meta":{"_acf_changed":true},"menu-guide-dutilisateur":[22],"class_list":["post-4625","guide-dutilisateur","type-guide-dutilisateur","status-publish","hentry","menu-guide-dutilisateur-4-statistiques-descriptives"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pr\u00e9parer les donn\u00e9es - Ellistat<\/title>\n<meta name=\"description\" content=\"Comprendre la diff\u00e9rence entre \u00e9chantillon et r\u00e9p\u00e9tition, dispersion court terme et globale : la base pour bien pr\u00e9parer une analyse statistique fiable.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ellistat.com\/it\/guida-per-lutente\/preparare-i-dati\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pr\u00e9parer les donn\u00e9es - 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