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www.zaluu.com www.zaluu.com Sample size for 3%, 5%, 7% and 10% Precision Levels Where Confidence Level is 95% and P=.5. Size of Population 500 600 700 800 900 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 15,000 20,000 25,000 50,000 100,000 >100,000 3% a a a a a a 714 811 870 909 938 959 976 989 1,000 1,034 1,053 1,064 1,087 1,099 1,111 Sample Size (n) for Precision (e) of: 5% 222 240 255 267 277 286 333 353 364 370 375 378 381 383 385 390 392 394 397 398 400 7% 145 152 158 163 166 169 185 191 194 196 197 198 199 200 200 201 204 204 204 204 204 10% 83 86 88 89 90 91 95 97 98 98 98 99 99 99 99 99 100 100 100 100 100

a = Assumption of normal population is poor (Yamane, 1967). The entire population should be sampled. Footnotes1. This document is PEOD6, one of a series of the Agricultural Education and Communication Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Original publication date November 1992. Reviewed April 2009. Visit the EDIS Web Site at http://edis.ifas.ufl.edu. 2. Glenn D. Israel, associate professor, Department of Agricultural Education and Communication, and extension specialist, Program Evaluation and Organizational Development, Institute of Food and Agricultural Sciences (IFAS), University of Florida, Gainesville 32611.The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For more information on obtaining other extension publications, contact your county Cooperative Extension service. U.S. Department of Agriculture, Cooperative Extension Service, University of Florida, IFAS, Florida A. & M. University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Millie Ferrer, Interim Dean.