{"id":522,"date":"2020-09-09T01:10:30","date_gmt":"2020-09-08T23:10:30","guid":{"rendered":"https:\/\/blogs.ugr.es\/physics-zip\/?p=522"},"modified":"2020-09-09T01:10:30","modified_gmt":"2020-09-08T23:10:30","slug":"intervalo-de-confianza-para-medidas-indirectas","status":"publish","type":"post","link":"https:\/\/blogs.ugr.es\/physics-zip\/intervalo-de-confianza-para-medidas-indirectas\/","title":{"rendered":"Intervalo de confianza para medidas indirectas"},"content":{"rendered":"<p>Siguiendo la propagaci\u00f3n de errores (cuadr\u00e1tica), se obtiene una \u00abdesviaci\u00f3n est\u00e1ndar\u00bb del valor medio de la magnitud indirecta, a partir de medidas directas de otras magnitudes experimentalmente accesibles. Pero esa desviaci\u00f3n est\u00e1ndar se debe multiplicar por un prefactor que depender\u00e1 del nivel de confianza exigido y de los grados de libertad (n\u00famero de medidas menos 1). Usando la\u00a0aproximaci\u00f3n de Welch-Satterthwaite, es posible calcular el n\u00famero de grados de libertad <em>efectivo<\/em> resultante de varias medias de medidas directas. Si este n\u00famero efectivo es menor que 30, se deber\u00e1 usar la distribuci\u00f3n t-Student con esos grados de libertad para calcular los percentiles oportunos seg\u00fan el nivel de confianza elegido.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Siguiendo la propagaci\u00f3n de errores (cuadr\u00e1tica), se obtiene una \u00abdesviaci\u00f3n est\u00e1ndar\u00bb del valor medio de la magnitud indirecta, a partir de medidas directas de otras magnitudes experimentalmente accesibles. Pero esa desviaci\u00f3n est\u00e1ndar se debe multiplicar por un prefactor que depender\u00e1 del nivel de confianza exigido y de los grados de libertad (n\u00famero de medidas menos [&hellip;]<\/p>\n","protected":false},"author":524,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[1],"tags":[],"class_list":["post-522","post","type-post","status-publish","format-standard","category-measure","entry"],"_links":{"self":[{"href":"https:\/\/blogs.ugr.es\/physics-zip\/wp-json\/wp\/v2\/posts\/522","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.ugr.es\/physics-zip\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.ugr.es\/physics-zip\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.ugr.es\/physics-zip\/wp-json\/wp\/v2\/users\/524"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.ugr.es\/physics-zip\/wp-json\/wp\/v2\/comments?post=522"}],"version-history":[{"count":2,"href":"https:\/\/blogs.ugr.es\/physics-zip\/wp-json\/wp\/v2\/posts\/522\/revisions"}],"predecessor-version":[{"id":524,"href":"https:\/\/blogs.ugr.es\/physics-zip\/wp-json\/wp\/v2\/posts\/522\/revisions\/524"}],"wp:attachment":[{"href":"https:\/\/blogs.ugr.es\/physics-zip\/wp-json\/wp\/v2\/media?parent=522"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.ugr.es\/physics-zip\/wp-json\/wp\/v2\/categories?post=522"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.ugr.es\/physics-zip\/wp-json\/wp\/v2\/tags?post=522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}