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<h2 class="section"> 45.4 Fun&ccedil;&otilde;es e Vari&aacute;veis Definidas espec&iacute;ficas para estat&iacute;stica descritiva de v&aacute;rias vari&aacute;veis </h2>



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<dt><u>Fun&ccedil;&atilde;o:</u> <b>cov</b><i> (<var>matri