This is the program for the 2010 Joint Statistical Meetings in Vancouver, British Columbia.

Abstract Details

Activity Number: 527
Type: Contributed
Date/Time: Wednesday, August 4, 2010 : 10:30 AM to 12:20 PM
Sponsor: Section on Survey Research Methods
Abstract - #306639
Title: Variance Estimation for a Small Number of PSUs
Author(s): Hyunshik Lee*+
Companies: Westat
Address: 1600 Research Blvd, Rockville, MD, 20850,
Keywords: Between- and within-PSU variances ; variance ratio ; bias and variance of a variance estimator
Abstract:

In some surveys, the number of primary sampling unit (PSU) selected is small but the number of ultimate sampling units is large. The usual consistent variance estimator based solely on the between-PSU variance is not stable because the number of degrees of freedom is small. One alternative is to use a variance estimator that estimates the within-PSU variance by treating the PSUs as strata. It has a larger number of degrees of freedom but underestimates the variance. Combining these two estimators, we can produce a variance estimator that is more stable than the usual consistent variance estimator and less biased than the within-PSU variance estimator. The performance of such a hybrid estimator is demonstrated by simulation using a population similar to the population for an actual survey where this hybrid estimator has been used.


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