1970 Approximate Standard Errors (Tables A-F)

Table A. Approximate Standard Error of Estimated Numbers* (1-in-100 Sample)

Estimated Number Number of Persons or Households in Area Tabulated (estimated or census count)
100,000 250,000 500,000 1 million 5 million 25 million 200 million
200 140 140 140 140 140 140 140
500 220 220 220 220 220 220 220
1,000 310 310 310 310 310 310 310
2,500 490 500 500 500 500 500 500
5,000 690 700 700 700 700 700 700
10,000 940 980 990 990 990 1,000 1,000
25,000 1,360 1,490 1,530 1,550 1,570 1,570 1,570
50,000 1,570 1,990 2,110 2,170 2,210 2,220 2,230
100,000 -- 2,400 2,800 3,000 3,100 3,100 3,100
250,000 -- -- 3,500 4,300 4,800 5,000 5,000
500,000 -- -- -- 5,000 6,700 7,000 7,000
1 million -- -- -- -- 8,900 9,700 9,900
2.5 million -- -- -- -- 11,100 14,900 15,600
5 million -- -- -- -- -- 20,000 22,000
10 million -- -- -- -- -- 24,000 31,000
25 million -- -- -- -- -- -- 47,000
50 million -- -- -- -- -- -- 61,000

* Note: For specific subjects apply factors in Tables G and H.

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Table B. Approximate Standard Error of Estimated Percentage* (1-in-100 Sample)

Estimated Percentage Estimated Number of Persons or Households in Base of Percentage (in thousands)
2.5 5 10 25 50 100 250 500 1000 2500 5000 10,000
1% or 99% -- 1.4 1.0 0.6 0.4 0.31 0.20 0.14 0.10 0.06 0.04 0.03
2% or 98% 2.8 2.0 1.4 0.9 0.6 0.44 0.28 0.20 0.14 0.09 0.06 0.04
5% or 95% 4.4 3.1 2.2 1.4 1.0 0.68 0.44 0.31 0.22 0.14 0.10 0.07
10% or 90% 6.0 4.2 3.0 1.9 1.3 0.94 0.60 0.42 0.30 0.19 0.13 0.09
15% or 85% 7.1 5.0 3.6 2.3 1.6 1.12 0.71 0.50 0.36 0.23 0.16 0.11
20% or 80% 7.9 5.6 4.0 2.5 1.8 1.25 0.80 0.56 0.40 0.25 0.18 0.13
25% or 75% 8.6 6.1 4.3 2.7 1.9 1.36 0.86 0.61 0.43 0.27 0.19 0.14
35% or 65% 9.5 6.7 4.8 3.0 2.1 1.49 0.95 0.67 0.48 0.30 0.21 0.15
50% 10.0 7.1 5.0 3.2 2.2 1.57 1.00 0.70 0.50 0.32 0.22 0.16

*Note: for specific subjects apply factors in tables G and H

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Table C. Approximate Standard Error of Estimated Numbers* (1-in-1,000 Sample)

Estimated Number Number of Persons or Households in Area Tabulated (estimated or census count)
100,000 250,000 500,000 1 million 5 million 25 million 200 million
2,000 1,400 1,400 1,400 1,400 1,400 1,400 1,400
5,000 2,200 2,200 2,200 2,200 2,200 2,200 2,200
10,000 3,000 3,100 3,100 3,100 3,200 3,200 3,200
25,000 4,300 4,700 4,900 4,900 5,000 5,000 5,000
50,000 5,000 6,300 6,700 6.900 7,000 7,100 7,100
100,000 -- 7,700 8,900 9,500 9,900 10,000 10,000
250,000 -- -- 11,200 13,700 15,400 15,700 15,800
500,000 -- -- -- 15,800 21,200 22,100 22,300
1 million -- -- -- -- 28,000 31,000 32,000
2.5 million -- -- -- -- 35,000 47,000 50,000
5 million -- -- -- -- -- 63,000 70,000
10 million -- -- -- -- -- 77,000 97,000
25 million -- -- -- -- -- -- 148,000
50 million -- -- -- -- -- -- 194,000

* Note: For specific subjects apply factors in Tables G and H.

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Table D. Approximate Standard Error of Estimated Percentage* (1-in-1,000 Sample)

Estimated Percentage Estimated Number of Persons or Households in Base of Percentage (in thousands)
25 50 100 250 500 1,000 2,500 5,000 10,000 25,000 50,000 100,000
1% or 99% -- 1.4 1.0 0.6 0.4 0.31 0.20 0.14 0.10 0.06 0.04 0.03
2% or 98% 2.8 2.0 1.4 0.9 0.6 0.44 0.28 0.20 0.14 0.09 0.06 0.04
5% or 95% 4.4 3.1 2.2 1.4 1.0 0.69 0.44 0.31 0.22 0.14 0.10 0.07
10% or 90% 6.0 4.2 3.0 1.9 1.3 0.95 0.60 0.42 0.30 0.19 0.13 0.10
15% or 85% 7.1 5.0 3.6 2.3 1.6 1.13 0.71 0.51 0.36 0.23 0.16 0.11
20% or 80% 8.0 5.7 4.0 2.5 1.8 1.26 0.80 0.57 0.40 0.25 0.18 0.13
25% or 75% 8.7 6.1 4.3 2.7 1.9 1.37 0.87 0.61 0.43 0.27 0.19 0.14
35% or 65% 9.5 6.7 4.8 3.0 2.1 1.51 0.95 0.67 0.48 0.30 0.21 0.15
50% 10.0 7.1 5.0 3.2 2.2 1.58 1.00 0.71 0.50 0.32 0.22 0.16

*Note: for specific subjects apply factors in tables G and H

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Table E. Approximate Standard Error of Estimated Numbers* (1-in-10,000 Sample)

Estimated Number Number of Persons or Households in Area Tabulated (estimated or census count)
100,000 250,000 500,000 1 million 5 million 25 million 200 million
20,000 13,000 14,000 14,000 14,000 14,000 14,000 14,000
50,000 16,000 20,000 21,000 22,000 22,000 22,000 22,000
100,000 -- 25,000 28,000 30,000 31,000 32,000 32,000
250,000 -- -- 35,000 43,000 49,000 50,000 50,000
500,000 -- -- -- 50,000 67,000 70,000 71,000
1 million -- -- -- -- 89,000 98,000 100,000
2.5 million -- -- -- -- 112,000 150,000 157,000
5 million -- -- -- -- -- 200,000 220,000
10 million -- -- -- -- -- 240,000 310,000
25 million -- -- -- -- -- -- 470,000
50 million -- -- -- -- -- -- 610,000

* Note: For specific subjects apply factors in Tables G and H.

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Table F. Approximate Standard Error of Estimated Percentage* (1-in-10,000 Sample)

Estimated Percentage Estimated Number of Persons or Households in Base of Percentage (in thousands)
100 250 500 1,000 2,500 5,000 10,000 25,000 50,000 100,000 200,000
1% or 99% -- -- 1.4 1.0 0.6 0.4 0.31 0.20 0.14 0.10 0.08
2% or 98% -- 2.8 2.0 1.4 0.9 0.6 0.44 0.28 0.20 0.14 0.11
5% or 95% 6.9 4.4 3.1 2.2 1.4 1.0 0.69 0.44 0.31 0.22 0.16
10% or 90% 9.5 6.0 4.2 3.0 1.9 1.3 0.95 0.60 0.42 0.30 0.23
15% or 85% 11.3 7.1 5.1 3.6 2.3 1.6 1.13 0.71 0.51 0.36 0.27
20% or 80% 12.6 8.0 5.7 4.0 2.5 1.8 1.27 0.80 0.57 0.40 0.30
25% or 75% 13.7 8.6 6.1 4.3 2.7 1.9 1.37 0.87 0.61 0.43 0.33
35% or 65% 15.1 9.5 6.7 4.8 3.0 2.1 1.51 0.95 0.68 0.48 0.36
50% 15.8 10.0 7.1 5.0 3.2 2.2 1.58 1.00 0.71 0.50 0.38

*Note: for specific subjects apply factors in tables G and H

Go to Tables G and H
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