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OCR for page 114
Prepublication Copy — Uncorrected Proofs Appendix C Standard Error Estimates for the September 2011 CPS Supplement on Volunteering This appendix reproduces a spreadsheet supplied by the Corporation for National and Community Service indicating the standard errors and confidence intervals under two scenarios for the Current Population Survey (CPS) Volunteering Supplement. Under the first one, the statistics for the usual full sample are shown; under the second one, the statistics are shown for what they would be if the sample were reduced to one-half of the full size. C-1

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Prepublication Copy — Uncorrected Proofs Estimates of Standard Errors for CPS Volunteering Supplement for Full Sample Size and One-Half Sample Size Confidence Number of Proportion of Standard Error Interval for Standard Confidence Statea Responding Persons Who (of Proportion) Proportion (+/-) Error Interval (+/-) Persons Volunteer —full sample —full sample —half sample —half sample UT 1514 40.91% 2.66% 4.38% 3.77% 6.20% ID 1540 38.99% 2.46% 4.04% 3.48% 5.72% IA 2522 38.31% 1.76% 2.89% 2.48% 4.09% MN 3150 38.08% 1.02% 1.68% 1.44% 2.37% SD 2066 36.72% 1.56% 2.56% 2.20% 3.63% NE 1863 36.70% 1.45% 2.39% 2.06% 3.38% KS 1909 36.38% 1.78% 2.92% 2.51% 4.13% OR 1950 36.21% 1.73% 2.84% 2.45% 4.02% WA 2146 34.35% 1.63% 2.69% 2.31% 3.80% WI 2645 33.99% 1.25% 2.05% 1.77% 2.90% AK 1504 33.48% 2.19% 3.61% 3.10% 5.10% ME 2353 32.92% 1.51% 2.48% 2.13% 3.51% CO 2628 32.68% 1.45% 2.39% 2.05% 3.37% MO 2004 31.99% 1.55% 2.55% 2.20% 3.61% VT 1893 31.82% 1.50% 2.46% 2.12% 3.48% ND 1553 30.73% 2.46% 4.04% 3.47% 5.71% WY 1632 29.84% 1.57% 2.59% 2.22% 3.66% MT 1127 29.67% 2.06% 3.38% 2.91% 4.79% NH 2698 29.62% 1.29% 2.12% 1.82% 3.00% OK 1431 29.45% 1.75% 2.88% 2.47% 4.07% CT 2630 28.71% 1.24% 2.03% 1.75% 2.88% VA 2490 28.56% 1.43% 2.35% 2.02% 3.33% MD 2713 27.59% 1.12% 1.85% 1.59% 2.61% IL 3645 27.28% 1.00% 1.64% 1.41% 2.32% DC 1617 27.24% 1.47% 2.42% 2.08% 3.42% IN 1865 27.14% 1.65% 2.72% 2.34% 3.84% OH 3164 26.70% 1.55% 2.56% 2.20% 3.62% SC 1590 26.67% 1.45% 2.38% 2.05% 3.37% NM 969 26.65% 2.23% 3.66% 3.15% 5.18% DE 1801 26.55% 1.57% 2.58% 2.21% 3.64% PA 3554 26.48% 1.01% 1.66% 1.43% 2.35% MI 2757 26.29% 1.21% 2.00% 1.72% 2.83% NC 2343 26.28% 1.73% 2.84% 2.45% 4.02% GA 2310 26.26% 1.31% 2.15% 1.85% 3.05% CA 9786 25.81% 0.73% 1.20% 1.03% 1.70% MA 1873 25.76% 1.52% 2.50% 2.15% 3.54% MS 1128 25.63% 2.46% 4.04% 3.48% 5.72% C-2

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Prepublication Copy — Uncorrected Proofs AZ 1389 25.51% 1.95% 3.21% 2.76% 4.53% RI 1944 25.28% 1.43% 2.36% 2.03% 3.34% KY 1872 25.27% 1.65% 2.72% 2.34% 3.84% AL 1264 24.85% 1.97% 3.24% 2.79% 4.58% TN 1538 24.73% 1.81% 2.98% 2.56% 4.21% TX 5994 24.59% 0.87% 1.43% 1.23% 2.03% AR 1198 23.15% 2.41% 3.97% 3.41% 5.61% FL 4373 23.11% 0.88% 1.46% 1.25% 2.06% WV 1346 22.70% 1.70% 2.80% 2.40% 3.95% NJ 2247 22.57% 1.35% 2.22% 1.91% 3.14% NV 1680 22.45% 1.60% 2.63% 2.26% 3.71% HI 1791 20.80% 1.41% 2.32% 1.99% 3.28% NY 4806 20.61% 0.81% 1.34% 1.15% 1.89% LA 1105 19.20% 1.73% 2.85% 2.45% 4.03% NOTES: a The order of the states is in declining order of the percentage of residents who reported volunteering. SOURCE: Calculations provided directly to the panel by Corporation for National and Community Service. C-3