{"id":209,"date":"2023-08-04T04:10:40","date_gmt":"2023-08-04T04:10:40","guid":{"rendered":"https:\/\/statorials.org\/pt\/aula-estatistica\/"},"modified":"2023-08-04T04:10:40","modified_gmt":"2023-08-04T04:10:40","slug":"aula-estatistica","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/aula-estatistica\/","title":{"rendered":"Classe (estat\u00edsticas)"},"content":{"rendered":"<p>Este artigo explica o que s\u00e3o classes de estat\u00edstica e quais s\u00e3o suas caracter\u00edsticas. Al\u00e9m disso, voc\u00ea poder\u00e1 ver um exemplo no qual s\u00e3o calculadas todas as caracter\u00edsticas de uma classe. <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%c2%bfque-es-una-clase-en-estadistica\"><\/span> O que \u00e9 um curso de estat\u00edstica?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Nas estat\u00edsticas, uma <strong>classe<\/strong> \u00e9 um agrupamento de valores. Em outras palavras, uma classe \u00e9 um conjunto de valores de uma amostra.<\/p>\n<p> Por exemplo, o intervalo [30,35) \u00e9 uma classe na qual todos os valores de 30 (inclusivo) a 35 (n\u00e3o inclusivo) s\u00e3o agrupados.<\/p>\n<p> Portanto, em estat\u00edstica, as classes s\u00e3o os grupos nos quais um conjunto de dados \u00e9 dividido. <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"caracteristicas-de-una-clase\"><\/span> Caracter\u00edsticas de uma classe<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Nas estat\u00edsticas, uma turma tem principalmente tr\u00eas caracter\u00edsticas: limites da turma, extens\u00e3o da turma e nota da turma. Cada um deles \u00e9 explicado abaixo.<\/p>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"limites-de-la-clase\"><\/span> Limites de aula<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p> <strong>Os limites de classe<\/strong> s\u00e3o os valores que delimitam o grupo, ou seja, o valor m\u00ednimo e o valor m\u00e1ximo que formam o intervalo de classe. Portanto, qualquer classe possui um limite inferior e um limite superior.<\/p>\n<p> Por exemplo, a classe [40,50) tem um limite inferior e um limite superior de 40 e 50 respectivamente.<\/p>\n<p> Geralmente, o limite inferior est\u00e1 inclu\u00eddo na classe, enquanto o limite superior n\u00e3o pertence \u00e0 classe.<\/p>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"amplitud-de-la-clase\"><\/span> Escopo da classe<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p> A <strong>largura da classe<\/strong> \u00e9 a diferen\u00e7a entre o limite superior e o limite inferior da classe. Portanto, a largura de uma classe \u00e9 calculada subtraindo o limite superior menos o limite inferior.<\/p>\n<p> Por exemplo, a largura da classe [40,50) \u00e9 igual a 10, j\u00e1 que 50 menos 40 \u00e9 igual a 10: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-9165fc22aade86677b48999cf9eec5ef_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"[40,50)\\quad\\longrightarrow\\ \\quad \\text{Amplitud}=50-40=10\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"330\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"marca-de-la-clase\"><\/span> notas de aula<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p> A <strong>nota da turma<\/strong> \u00e9 o ponto m\u00e9dio dos limites da turma. Ent\u00e3o, para obter a nota da turma, voc\u00ea deve somar seus dois limites e depois dividir por dois.<\/p>\n<p> Por exemplo, a nota do intervalo de classe [40,50) \u00e9 45, pois \u00e9 o ponto que fica entre os seus dois limites.<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-5872a37283d340a24b1aa32dcce9853c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"[40,50)\\quad\\longrightarrow\\ \\quad C_i=\\cfrac{40+50}{2}=45\" title=\"Rendered by QuickLaTeX.com\" height=\"39\" width=\"274\" style=\"vertical-align: -12px;\"><\/p>\n<\/p>\n<p> A marca da classe \u00e9 geralmente representada pelo s\u00edmbolo C <sub>i<\/sub> ou X <sub>i<\/sub> .<\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"ejemplo-de-clase\"><\/span> Classe de exemplo<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Agora que conhecemos a defini\u00e7\u00e3o de uma classe e suas caracter\u00edsticas, para entender melhor o conceito veremos um exemplo no qual s\u00e3o calculadas todas as suas diferentes partes. <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-93871a9de64c0cb9f16fe59ff4c4412a_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"[70,75)\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"53\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-7d144b5efef43ca01bcedb904cccae5b_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{array}{l}\\text{L\\'imite inferior}=70\\\\[2ex]\\text{L\\'imite superior}=75\\end{array}\" title=\"Rendered by QuickLaTeX.com\" height=\"55\" width=\"160\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-e0ef28b1b6ba2e7bcff740babca98477_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\text{Amplitud}=75-70=5\" title=\"Rendered by QuickLaTeX.com\" height=\"17\" width=\"187\" style=\"vertical-align: -4px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-6637c66bee3d84e278e86e556c5e0e99_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"[70,75)\\quad\\longrightarrow\\ \\quad C_i=\\cfrac{70+75}{2}=72,5\" title=\"Rendered by QuickLaTeX.com\" height=\"39\" width=\"291\" style=\"vertical-align: -12px;\"><\/p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Este artigo explica o que s\u00e3o classes de estat\u00edstica e quais s\u00e3o suas caracter\u00edsticas. Al\u00e9m disso, voc\u00ea poder\u00e1 ver um exemplo no qual s\u00e3o calculadas todas as caracter\u00edsticas de uma classe. O que \u00e9 um curso de estat\u00edstica? Nas estat\u00edsticas, uma classe \u00e9 um agrupamento de valores. Em outras palavras, uma classe \u00e9 um conjunto [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-209","post","type-post","status-publish","format-standard","hentry","category-estatisticas"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u25b7 O que \u00e9 um curso? 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