East Bay Jewish Community Study - Jewish Federation of the ...
East Bay Jewish Community Study - Jewish Federation of the ...
East Bay Jewish Community Study - Jewish Federation of the ...
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Sampling Error<br />
The margin <strong>of</strong> <strong>the</strong> sampling error for <strong>the</strong> total survey <strong>of</strong> 820 <strong>Jewish</strong> households is +/- 3.2<br />
percentage points. Within <strong>the</strong> RDD portion <strong>of</strong> <strong>the</strong> sample, <strong>the</strong> margin <strong>of</strong> error is +/- 8.2<br />
percentage points.<br />
The margins <strong>of</strong> error for <strong>the</strong> population estimates by region are as follows:<br />
Figure 100: Margin <strong>of</strong> Error by Region<br />
Total<br />
Jews<br />
Standard<br />
Error<br />
Margin <strong>of</strong><br />
Error<br />
95% Confidence<br />
Interval<br />
Lower<br />
Upper<br />
Oakland-Berkeley<br />
Corridor<br />
64,220 5,353 10,492 53,728 74,712<br />
Hayward Area 9,955 3,164 6,201 3,754 16,156<br />
Tri-valley Tri-cities 23,720 3,888 7,620 16,100 31,341<br />
LAMORINDA 5,013 1,827 3,581 1,433 8,594<br />
Central Contra Costa 22,207 3,427 6,717 15,490 28,924<br />
680 Corridor 6,379 2,458 4,818 1,561 11,196<br />
Western Contra Costa 11,376 1,803 3,533 7,843 14,910<br />
<strong>East</strong>ern Contra Costa 10,672 2,752 5,394 5,278 16,066<br />
Solano County 12,076 2,837 5,560 6,516 17,636<br />
Napa County 11,197 4,573 8,963 2,235 20,160<br />
Total 176,816 10,425 20,433 156,383 197,249<br />
Please note that <strong>the</strong> margin <strong>of</strong> error estimates do not account for sources <strong>of</strong> error o<strong>the</strong>r than<br />
sampling error, such as self-selection bias, attrition bias, or exclusion bias.<br />
The overall margin <strong>of</strong> error estimates are <strong>the</strong> most conservative estimates <strong>of</strong> <strong>the</strong> margin <strong>of</strong> error<br />
and apply when percentages are close to 50 percent. As percentages move closer to 0 or 100,<br />
<strong>the</strong> margin <strong>of</strong> error shrinks. Please see <strong>the</strong> table below for guidance. Also remember that subpopulations<br />
will have a larger margin <strong>of</strong> error.<br />
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