This is the program for the 2010 Joint Statistical Meetings in Vancouver, British Columbia.
Abstract Details
Activity Number:
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527
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Type:
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Contributed
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Date/Time:
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Wednesday, August 4, 2010 : 10:30 AM to 12:20 PM
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Sponsor:
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Section on Survey Research Methods
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Abstract - #306639 |
Title:
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Variance Estimation for a Small Number of PSUs
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Author(s):
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Hyunshik Lee*+
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Companies:
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Westat
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Address:
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1600 Research Blvd, Rockville, MD, 20850,
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Keywords:
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Between- and within-PSU variances ;
variance ratio ;
bias and variance of a variance estimator
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Abstract:
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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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Authors who are presenting talks have a * after their name.
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