January 2010
Beginner
480 pages
15h 36m
Portuguese (Portugal, Brazil)
Content preview from USE A CABEÇA! ANÁLISE DE DADOS
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174 Capítulo 6
o cálculo prevalece
O número de pessoas que está com gripe afeta o número de
pessoas que recebem resultado positivo erroneamente?
A gripe dos lagartos é muito comum?
Pelo menos quando se trata de
situações nas quais as pessoas que
não estão com gripe apresentam
resultados positivos, parece que a
prevalência da gripe dos lagartos na
população geral faz diferença.
Na verdade, a menos que saibamos
quantas pessoas já tiveram a gripe
dos lagartos, além da análise de
precisão do teste, simplesmente não
conseguiremos descobrir qual é a
probabilidade de você ter a gripe.
Nós precisamos de
mais dados para encontrar
sentido neste teste
diagnóstico. ...
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