{"id":109392,"date":"2020-01-29T18:13:42","date_gmt":"2020-01-29T17:13:42","guid":{"rendered":"https:\/\/www.superprof.es\/diccionario\/estadistica\/marca-clase.html"},"modified":"2026-10-07T17:44:08","modified_gmt":"2026-10-07T15:44:08","slug":"marca-clase","status":"publish","type":"post","link":"https:\/\/www.superprof.es\/diccionario\/matematicas\/estadistica\/marca-clase.html","title":{"rendered":"Marca de clase"},"content":{"rendered":"<section style=\"\">\r\n           \n\n<p class=\"wp-block-paragraph\">La <strong>marca de clase<\/strong> es el <strong>punto medio<\/strong> de cada <strong>intervalo<\/strong>.<\/p>\n\n\r\n              \n\n<p class=\"wp-block-paragraph\">La <strong>marca de clase<\/strong> es el <strong>valor<\/strong> que representa a todo el <strong>intervalo<\/strong> para el <strong>c\u00e1lculo<\/strong> de algunos <strong>par\u00e1metros<\/strong> como la <a href=\"media-aritmetica.html\">media artm\u00e9tica<\/a> o la <a href=\"desviacion-tipica.html\">desviaci\u00f3n t\u00edpica<\/a>.<\/p>\n\n\r\n              \n\n<p class=\"wp-block-paragraph\">Se representa por <strong>c<sub>i <\/sub><\/strong> o <strong>x<sub>i<\/sub><\/strong>.<\/p>\n\n\r\n              \n\n<h2 class=\"wp-block-heading\">Ejemplo<\/h2>\n\n\r\n              <table width=\"50%\" border=\"1\" class=\"t_izq\" cellspacing=\"0\" cellpadding=\"6\">\r\n                          <tr>\r\n                            <td> <\/td>\r\n                            <th>x<sub>i<\/sub><\/th>\r\n                            <th>f<sub>i<\/sub><\/th>\r\n                            <th>x<sub>i<\/sub> \u00b7 f<sub>i<\/sub><\/th>\r\n                            <th>x<sub>i<\/sub><sup>2<\/sup> \u00b7 f<sub>i<\/sub><\/th>\r\n                          <\/tr>\r\n                          <tr>\r\n                            <th>[10, 20)<\/th>\r\n                            <td> 15<\/td>\r\n                            <td>1<\/td>\r\n                            <td>15<\/td>\r\n                            <td>225<\/td>\r\n                          <\/tr>\r\n                          <tr>\r\n                            <th>[20, 30)<\/th>\r\n                            <td>25<\/td>\r\n                            <td>8<\/td>\r\n                            <td>200<\/td>\r\n                            <td>5000<\/td>\r\n                          <\/tr>\r\n                          <tr>\r\n                            <th>[30,40)<\/th>\r\n                            <td>35<\/td>\r\n                            <td>10<\/td>\r\n                            <td>350<\/td>\r\n                            <td>12 250<\/td>\r\n                          <\/tr>\r\n                          <tr>\r\n                            <th>[40, 50)<\/th>\r\n                            <td>45<\/td>\r\n                            <td>9<\/td>\r\n                            <td>405<\/td>\r\n                            <td>18 225<\/td>\r\n                          <\/tr>\r\n                          <tr>\r\n                            <th>[50, 60)<\/th>\r\n                            <td>55<\/td>\r\n                            <td>8<\/td>\r\n                            <td>440<\/td>\r\n                            <td>24 200<\/td>\r\n                          <\/tr>\r\n                          <tr>\r\n                            <th>[60,70)<\/th>\r\n                            <td>65<\/td>\r\n                            <td>4<\/td>\r\n                            <td>260<\/td>\r\n                            <td>16  900<\/td>\r\n                          <\/tr>\r\n                          <tr>\r\n                            <th>[70, 80)<\/th>\r\n                            <td>75<\/td>\r\n                            <td>2<\/td>\r\n                            <td>150<\/td>\r\n                            <td>11 250<\/td>\r\n                          <\/tr>\r\n                          <tr>\r\n                            <td> <\/td>\r\n                            <td> <\/td>\r\n                            <td style=\"color:#900;\">42<\/td>\r\n                            <td style=\"color:#900;\">1 820<\/td>\r\n                            <td style=\"color:#900;\">88 050<\/td>\r\n                          <\/tr>\r\n              <\/table>\r\n                        \n\n<p class=\"wp-block-paragraph\"><img decoding=\"async\" src=\"https:\/\/www.superprof.es\/diccionario\/wp-content\/uploads\/2020\/01\/marca-de-clase-1.gif\" alt=\"Explicaciones y ejemplos de marca de clase - 1\"  ><\/p>\n\n\r\n                        \r\n                                                  \n\n<p class=\"wp-block-paragraph\"><img decoding=\"async\" src=\"https:\/\/www.superprof.es\/diccionario\/wp-content\/uploads\/2020\/01\/marca-de-clase-2.gif\" alt=\"Explicaciones y ejemplos de marca de clase - 2\"  ><\/p>\n\n\n<\/section>","protected":false},"excerpt":{"rendered":"<p>La marca de clase es el punto medio de cada intervalo. La marca de clase es el valor que representa a todo el intervalo para el c\u00e1lculo de algunos par\u00e1metros como la media artm\u00e9tica o la desviaci\u00f3n t\u00edpica. Se representa por ci o xi. Ejemplo xi fi xi \u00b7 fi xi2 \u00b7 fi [10, 20) [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","footnotes":""},"categories":[380],"tags":[373],"class_list":["post-109392","post","type-post","status-publish","format-standard","hentry","category-estadistica","tag-m"],"acf":[],"author_meta":{"display_name":"Andra","author_link":"https:\/\/www.superprof.es\/diccionario\/author\/andra"},"featured_img":null,"coauthors":[],"tax_additional":{"categories":{"linked":["<a href=\"https:\/\/www.superprof.es\/diccionario\/matematicas\/estadistica\" class=\"advgb-post-tax-term\">Estad\u00edstica<\/a>"],"unlinked":["<span class=\"advgb-post-tax-term\">Estad\u00edstica<\/span>"]},"tags":{"linked":["<a href=\"https:\/\/www.superprof.es\/diccionario\/matematicas\/estadistica\" class=\"advgb-post-tax-term\">m<\/a>"],"unlinked":["<span class=\"advgb-post-tax-term\">m<\/span>"]}},"comment_count":"0","relative_dates":{"created":"Publicado 7 a\u00f1os hace","modified":"Actualizado 1 mes hace"},"absolute_dates":{"created":"Publicado el 29 enero 2020","modified":"Actualizado el 7 octubre 2026"},"absolute_dates_time":{"created":"Publicado el 29 enero 2020 18 h 13 min","modified":"Actualizado el 7 octubre 2026 17 h 44 min"},"featured_img_caption":"","series_order":"","_links":{"self":[{"href":"https:\/\/www.superprof.es\/diccionario\/wp-json\/wp\/v2\/posts\/109392","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.superprof.es\/diccionario\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.superprof.es\/diccionario\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.superprof.es\/diccionario\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.superprof.es\/diccionario\/wp-json\/wp\/v2\/comments?post=109392"}],"version-history":[{"count":6,"href":"https:\/\/www.superprof.es\/diccionario\/wp-json\/wp\/v2\/posts\/109392\/revisions"}],"predecessor-version":[{"id":141832,"href":"https:\/\/www.superprof.es\/diccionario\/wp-json\/wp\/v2\/posts\/109392\/revisions\/141832"}],"wp:attachment":[{"href":"https:\/\/www.superprof.es\/diccionario\/wp-json\/wp\/v2\/media?parent=109392"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.superprof.es\/diccionario\/wp-json\/wp\/v2\/categories?post=109392"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.superprof.es\/diccionario\/wp-json\/wp\/v2\/tags?post=109392"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}