East Bay Jewish Community Study - Jewish Federation of the ...

Figure 98: Age Comparison
National Jewish
Age (2000 Jewish
Population Survey)
East Bay Age
(2010 US
Census Data)
San
Francisco
Study 27
GQR Survey:
Unweighted
Age 28
GQR Survey:
Weighted
Age
20-29 18% 18% 7% 2% 11%
30-39 15% 19% 19% 7% 14%
40-49 19% 20% 20% 16% 23%
50-59 18% 19% 37% 25% 22%
60 and
over
29% 23% 16% 46% 26%
During the course of the interviews, some people did not finish and broke off the interviews.
Because there is a correlation between the chance of someone breaking off and their
demographic characteristics, those who break off in the middle of the survey have distinct
characteristics. This will, in turn will have biasing effect on the Jewish incidence estimation. In
order to minimize and correct for potential biases from break offs and invalid responses such as
don’t know or no answer, we imputed missing values with statistical algorithm called multiple
imputation.
The literature in missing data suggests we create at least five imputed datasets and obtain
estimates by averaging estimates across imputed datasets. We created 10 imputed datasets
and then adjusted the margins of error as suggested by Little and Rubin (1987). 29
27 ―Jewish Community Study of San Francisco‖ 2003. Jewish Community Federation of San Francisco, the Peninsula,
Marin and Sonoma Counties -- San Francisco study uses age breaks 18-24,25-34,35-44,45-64 and 65+
28 GQR Survey includes ages 18-29
29 Wiley,―Little and Rubin, Statistical analysis with Missing Data‖ 1987.
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