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CEP640 -
Population and Sample Sizes

Cleborne D. Maddux, Ph.D.
Professor

maddux@unr.edu

Department of Counseling and Educational Psychology

College of Education
The University of Nevada, Reno

POPULATION AND SAMPLE SIZES

N = POPULATION SIZE
s = MINIMUM SAMPLE SIZE, ALPHA=.05
N s N s N s
10 10 220 140 1,200 291
15 14 230 144 1,300 297
20 19 240 148 1,400 302
25 24 250 152 1,500 306
30 28 260 155 1,600 310
35 32 270 159 1,700 313
40 36 280 162 1,800 317
45 40 290 165 1,900 320
50 44 300 169 2,000 322
55 48 320 175 2,200 327
60 52 340 181 2,400 331
65 56 360 186 2,600 335
70 59 380 191 2,800 338
75 63 400 196 3,000 341
80 66 420 201 3,500 346
85 70 440 205 4,000 351
90 73 460 210 4,500 354
95 76 480 214 5,000 357
100 80 500 217 6,000 361
110 86 550 226 7,000 364
120 92 600 234 8 000 367
130 97 650 242 9:000 368
140 103 700 248 10,000 370
150 108 750 254 15,000 375
160 113 800 260 20,000 377
170 118 850 265 30,000 379
180 123 900 269 40,000 380
190 127 950 274 50,000 381
200 132 1,000 278 75,000 382
210 136 1,100 285 1,000,000 384

Source: Cornett, J. D., & Beckner, W. (1975). Introductory Statistics for the Behavioral Sciences. Columbus, OH: Charles Merrill Publishing Co., p.46.

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University of Nevada, Reno
Please direct questions to: maddux@unr.edu
URL of this document:http://unr.edu:80/homepage/maddux/stat/sample.html