ESTIMAÇÃO DE MODELOS LOGLINEARES COM DADOS FALTANTES: UMA APLICAÇÃO AO SAEB/99 / LOGLINEAR MODEL ESTIMATION WITH MISSING DATA: AN APPLICATION TO SAEB/99.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2002

RESUMO

Generally, in statiscal analysis, missing value in one variable at least, implies the elimination of the respondent unit. That strategy, default in the most of statistical softwares, don´t produce results free from bias, unless the missing data are Missing Completly At Random (MCAR). This dissertation shows the classification about the mechanisms that lead to missing data and the modeling of categorical data dealing with missing data. To do that we combine loglinear model and the EM (Expectation- Maximization) algorithm. This combination produce the agorithm called ECM (Expectation-Conditional Maximization) algorithm. The method is applied to SAEB educational data. The objective is to investigate the relationship between responsable for developing the pedagogic project and the impact on the mean proficiency of school.

ASSUNTO(S)

ecm algorithm modelo loglinear algoritmo ecm missing data dados faltantes loginear model

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