

{"id":997141,"date":"2018-09-13T02:00:09","date_gmt":"2018-09-13T09:00:09","guid":{"rendered":"https:\/\/www.questionpro.com\/blog\/escala-proporcional-e-escala-intervalar-quais-sao-as-suas-diferencas\/"},"modified":"2025-01-24T14:23:43","modified_gmt":"2025-01-24T21:23:43","slug":"escala-proporcional-e-escala-intervalar-quais-sao-as-suas-diferencas","status":"publish","type":"post","link":"https:\/\/www.questionpro.com\/blog\/pt\/escala-proporcional-e-escala-intervalar-quais-sao-as-suas-diferencas\/","title":{"rendered":"Escala proporcional e escala intervalar Quais s\u00e3o as suas diferen\u00e7as?"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">A escala proporcional e a escala intervalar s\u00e3o dois n\u00edveis de medi\u00e7\u00e3o. <\/span><a href=\"https:\/\/www.questionpro.com\/blog\/pt\/niveis-de-medicao-aprende-a-domina-los\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">n\u00edveis de medi\u00e7\u00e3o<\/span><\/a><span style=\"font-weight: 400;\"> onde os atributos das vari\u00e1veis s\u00e3o definidos quantitativamente. Existem quatro escalas de medida, as outras duas escalas s\u00e3o a <\/span><a href=\"https:\/\/www.questionpro.com\/blog\/pt\/escala-nominal-carateristicas-e-exemplos\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">escala nominal<\/span><\/a><span style=\"font-weight: 400;\"> e a <\/span><span style=\"font-weight: 400;\">escala ordinal<\/span><span style=\"font-weight: 400;\">. Hoy nos enfocaremos en las diferencias entre la escala proporcional y la escala de intervalo. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">Este conceito foi introduzido pela primeira vez pelo proeminente psic\u00f3logo <\/span><span style=\"font-weight: 400;\">Stanley Smith<\/span><span style=\"font-weight: 400;\"> em 1946. Escreveu um artigo intitulado &#8220;A teoria das escalas de medida&#8221;. <\/span><\/p>\n<h2><span style=\"font-weight: 400;\">O que \u00e9 a escala proporcional e a escala intervalar?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A <\/span><span style=\"font-weight: 400;\">escala proporcional<\/span><span style=\"font-weight: 400;\"> Uma escala proporcional \u00e9 uma escala de medida que tem mais ou menos as mesmas propriedades que uma <\/span><span style=\"font-weight: 400;\">escala de intervalos<\/span><span style=\"font-weight: 400;\">. Los datos de estas escalas tienen variables que son medibles. En la escala de proporci\u00f3n, se tiene un punto cero o un car\u00e1cter de origen. Por ejemplo, la temperatura exterior es de 0 grados Celsius, esto no quiere decir que la temperatura sea fr\u00eda o calurosa. Significa que hay un valor asignado para medir la temperatura. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">Os exemplos mais comuns de uma balan\u00e7a de r\u00e1cio s\u00e3o a altura, o peso, o dinheiro da idade e semelhantes. Por exemplo:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Em que grupo et\u00e1rio te encontras?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Menos de 20 anos<\/span><br \/><span style=\"font-weight: 400;\">21 a 30 anos de idade<\/span><br \/><span style=\"font-weight: 400;\">31 a 40 anos de idade<\/span><br \/><span style=\"font-weight: 400;\">41 a 50 anos de idade<\/span><br \/><span style=\"font-weight: 400;\">Mais de 50 anos<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A escala proporcional \u00e9 a escala mais informativa e precisa em termos da ordem e do n\u00famero de objectos na escala. A escala proporcional permite ao investigador aplicar qualquer t\u00e9cnica estat\u00edstica aos resultados. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">Numa escala intervalar, todos os atributos podem ser medidos. Qualquer medida pertencente a esta categoria pode ser classificada, contada, subtra\u00edda, adicionada, etc. Nota: n\u00e3o existe de modo algum uma rela\u00e7\u00e3o entre as duas medidas. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">Um bom exemplo desta categoria \u00e9 a medi\u00e7\u00e3o da temperatura. A temperatura numa sala com ar condicionado \u00e9 de 16 graus Celsius e a temperatura no exterior da sala \u00e9 de 32 graus Celsius. \u00c9 razo\u00e1vel dizer que a temperatura no exterior \u00e9 16 graus mais elevada do que no interior da sala. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">Mas, se dissesses que est\u00e1 duas vezes mais quente no exterior do que no interior, o teu resultado seria termodinamicamente incorreto. A sele\u00e7\u00e3o deste ponto de refer\u00eancia \u00e9 considerada zero, que \u00e9 tamb\u00e9m o ponto de congela\u00e7\u00e3o da \u00e1gua. Por isso, a diferen\u00e7a de temperatura dentro e fora da sala tem de ser um n\u00famero, n\u00e3o uma compara\u00e7\u00e3o. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">O ponto zero numa escala de intervalos \u00e9 arbitr\u00e1rio e tamb\u00e9m podem ser definidos valores negativos. As vari\u00e1veis que s\u00e3o medidas numa escala de intervalos s\u00e3o normalmente conhecidas como vari\u00e1veis de intervalos ou vari\u00e1veis escalares. <\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Diferen\u00e7as entre escala proporcional e escala de intervalos<\/span><\/h2>\n\n\n<table style=\"border-collapse: collapse;\">\n  <tr>\n    <th style=\"border: 1px solid #1B3380; color: #1B3380; padding: 10px;\">Escala de intervalos<\/th><th style=\"border: 1px solid #1B3380; color: #1B3380; padding: 10px;\">Escala proporcional<\/th>\n  <\/tr>\n  <tr>\n    <td style=\"border: 1px solid #1B3380; padding: 10px;\">Todas as vari\u00e1veis que s\u00e3o medidas na escala de intervalos podem ser adicionadas, subtra\u00eddas, multiplicadas, etc. Mas a rela\u00e7\u00e3o de c\u00e1lculo n\u00e3o \u00e9 poss\u00edvel. <\/td>\n    <td style=\"border: 1px solid #1B3380; padding: 10px;\">A escala proporcional tem todas as carater\u00edsticas de uma escala de intervalos, mas, al\u00e9m disso, \u00e9 utilizada para calcular propor\u00e7\u00f5es.<\/td>\n  <\/tr>\n  <tr>\n    <td style=\"border: 1px solid #1B3380; padding: 10px;\">O ponto zero de uma escala intervalar \u00e9 arbitr\u00e1rio.<\/td>\n    <td style=\"border: 1px solid #1B3380; padding: 10px;\">A escala de r\u00e1cios tem um car\u00e1cter de zero absoluto ou de origem.<\/td>\n  <\/tr>\n  <tr>\n    <td style=\"border: 1px solid #1B3380; padding: 10px;\">Estatisticamente, na escala de intervalos, calcula a m\u00e9dia aritm\u00e9tica.<\/td>\n    <td style=\"border: 1px solid #1B3380; padding: 10px;\">Estatisticamente, na escala proporcional, calcula-se a m\u00e9dia geom\u00e9trica ou harm\u00f3nica.<\/td>\n  <\/tr>\n  <tr>\n    <td style=\"border: 1px solid #1B3380; padding: 10px;\">A escala de intervalos pode medir o tamanho e a magnitude como factores m\u00faltiplos de uma unidade definida.<\/td>\n    <td style=\"border: 1px solid #1B3380; padding: 10px;\">A escala proporcional pode ser utilizada para medir o tamanho e a magnitude de um fator.<\/td>\n  <\/tr>\n  <tr>\n    <td style=\"border: 1px solid #1B3380; padding: 10px;\">Um exemplo cl\u00e1ssico de uma escala de varia\u00e7\u00e3o \u00e9 uma temperatura em graus Celsius. Por exemplo, a diferen\u00e7a de temperatura entre 50 graus e 60 graus \u00e9 de 10 graus, o mesmo acontecendo com a diferen\u00e7a entre 70 graus e 80 graus. <\/td>\n    <td style=\"border: 1px solid #1B3380; padding: 10px;\">Exemplos cl\u00e1ssicos de uma escala proporcional s\u00e3o qualquer vari\u00e1vel que tenha uma carater\u00edstica de zero absoluto, como a idade, o peso, a altura, um valor de vendas, a medida de uma r\u00e9gua, o rendimento obtido no \u00faltimo m\u00eas, etc.<\/td>\n  <\/tr>\n<\/table>\n\n\n\n<p>Agora que j\u00e1 conheces as diferen\u00e7as entre uma escala proporcional e uma escala intervalar, qual delas vais usar?<\/p>\n\n\n\n<br>\n<center>\n<a href=\"https:\/\/eu.questionpro.com\/a\/showEntry.do?lan=pt_PT&#038;custom1=blog\">\n        <button style=\"background: #ff9f00\">Cria uma conta gratuita<\/button>\n    <\/a>\n    <a href=\"https:\/\/contactar.questionpro.com\/t\/AM4X9Z3LxD?custom1=escala-proporcional\" target=\"_blank\" rel=\"noopener\">\n        <button>Agendar uma demonstra\u00e7\u00e3o<\/button>\n    <\/a>\n<\/center>\n<br>\n","protected":false},"excerpt":{"rendered":"<p>A escala proporcional e a escala intervalar s\u00e3o dois n\u00edveis de medi\u00e7\u00e3o. n\u00edveis de medi\u00e7\u00e3o onde os atributos das vari\u00e1veis [&hellip;]<\/p>\n","protected":false},"author":38,"featured_media":997142,"comment_status":"closed","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":""},"categories":[2193,2140],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Escala proporcional e escala intervalar Quais s\u00e3o as suas diferen\u00e7as?<\/title>\n<meta name=\"description\" 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