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{"id":95,"date":"2019-09-11T08:00:45","date_gmt":"2019-09-11T11:00:45","guid":{"rendered":"https:\/\/site.statplace.com.br\/?p=95"},"modified":"2024-10-08T12:45:42","modified_gmt":"2024-10-08T12:45:42","slug":"analise-multivariada","status":"publish","type":"post","link":"https:\/\/site.statplace.com.br\/blog\/analise-multivariada\/","title":{"rendered":"An\u00e1lise Multivariada: uma s\u00edntese dos principais m\u00e9todos"},"content":{"rendered":"\n

Artigo desenvolvido com a colabora\u00e7\u00e3o de Luiz Henrique Marques Carvalho.<\/p>\n\n\n\n

Sempre que \u00e9 necess\u00e1rio tomar uma decis\u00e3o, precisamos levar em considera\u00e7\u00e3o v\u00e1rios fatores que, em geral, n\u00e3o possuem a mesma import\u00e2ncia ou influ\u00eancia. Uma das principais utilidades da an\u00e1lise multivariada \u00e9 exatamente a identifica\u00e7\u00e3o desses fatores e das rela\u00e7\u00f5es entre eles para se obter uma imagem melhor e mais completa do ambiente. <\/p>\n\n\n\n

Mas o que \u00e9 An\u00e1lise Multivariada?<\/h3>\n\n\n\n

A an\u00e1lise multivariada consiste em um conjunto de m\u00e9todos estat\u00edsticos utilizados em situa\u00e7\u00f5es em que v\u00e1rias vari\u00e1veis s\u00e3o medidas simultaneamente em cada elemento amostral.<\/p>\n\n\n\n

Na maioria das vezes, as vari\u00e1veis s\u00e3o correlacionadas entre si e quanto maior o n\u00famero de vari\u00e1veis, mais complexa torna-se a an\u00e1lise por m\u00e9todos comuns.<\/p>\n\n\n\n

Em geral, os m\u00e9todos de an\u00e1lise multivariada s\u00e3o utilizados com o prop\u00f3sito de simplificar ou facilitar a interpreta\u00e7\u00e3o do fen\u00f4meno que est\u00e1 sendo estudado.<\/p>\n\n\n\n

Basicamente, a an\u00e1lise multivariada se divide em dois grupos: um primeiro consistindo em t\u00e9cnicas explorat\u00f3rias de simplifica\u00e7\u00e3o da estrutura de variabilidade dos dados, em uma tentativa de sintetizar as vari\u00e1veis, e um segundo, consistindo em t\u00e9cnicas de infer\u00eancia. <\/p>\n\n\n\n

M\u00e9todos de An\u00e1lise Multivariada<\/h3>\n\n\n\n

A seguir apresentaremos uma s\u00edntese de alguns dos m\u00e9todos de an\u00e1lise multivariada mais utilizados: <\/p>\n\n\n\n