¹Columbia University, Department of Statistics, New York, USA. Professor. Email: susanna@stat.columbia.edu
²Columbia University, Department of Statistics, New York, USA. Professor. Email: ysi@stat.columbia.edu
³Columbia University, Department of Statistics, New York, USA. Professor. Email: gelman@stat.columbia.edu

Survey weights are used for correcting known differences between the sample and the population due to sampling design, nonresponse, undercoverage, and other factors. However, practical considerations often result in weights that are not constructed in a systematic fashion. Graphical methods can be useful in understanding complex survey weights and their relations with other variables in the dataset, particularly when little to no information on the construction of the weights is available. Graphical tools can also assist in diagnostics, including detection of outliers and extreme weights. We apply our methods to the Fragile Families and Child Wellbeing Study, an ongoing longitudinal survey.

Key words: Diagnostics, Graphics, Sample Survey, Sampling Scheme.

Los pesos de muestreo se utilizan para corregir las diferencias conocidas entre la muestra y la población debido al diseño muestral, la falta de respuesta, subcobertura, y otros factores. Sin embargo, consideraciones prácticas a menudo resultan en pesos que no se han construido de una manera sistemática. Los métodos gráficos pueden ser útiles en la comprensión de ponderaciones complejas de la encuesta y sus relaciones con otras variables del conjunto de datos, sobre todo cuando se dispone de poca información sobre la construcción de los pesos. Las herramientas gráficas también pueden ayudar en el diagnóstico, incluyendo la detección de valores atípicos y pesos extremos. Aplicamos nuestros métodos en el estudio de Familias Frágiles y Bienestar Infantil, un estudio longitudinal en curso.

Palabras clave: diagnósticos, encuestas por muestreo, esquema de muestreo, gráficas.

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