1960 Approximate Standard Errors (Tables A-D)

Table A. Approximate Classification of Items by Type

Item Numbers by Degree of Homogeneity*

Type I Type II Type III
Low Homogeneity Moderate Homogeneity High Homogeneity
1-2 1-3 7-8
4-6 9-19 62-63
9-11 22-23 75-76
17-31 31 91
35-42 35-36 96
52-54 55
56-58 64-74
65-67 77-79
80 86
82-85 89-90
94-95

Plus all items on household schedules (identified by "H")

*All item numbers given are those preceded by P, indicating they are from a person record. As stated, all item numbers preceded by H, indicating they are from a household record, are Type I.

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Table B. Approximate Standard Errors of Estimated Totals for Housing and Household
Characteristics and for Population Characteristics of Type I

Size of estimate (000) Standard error (000) for data based on:
1 in 100 sample 1 in 1,000 sample 1 in 10,000 sample
25 2 4 15
50 2 6 20
100 3 9 30
250 4 14 40
500 6 19 60
1,000 8 27 80
2,500 13 42 130
5,000 18 57 180
10,000 24 76 240
25,000 -- -- 290
50,000 -- -- 410

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Table C. Approximate Standard Errors of Estimated Totals for Population Characteristics of Type II.

Size of estimate (000) Standard error (000) for data based on:
1 in 100 sample 1 in 1,000 sample 1 in 10,000 sample
25 2 5 15
50 2 7 20
100 4 11 40
250 5 17 50
500 8 24 80
1,000 11 34 110
2,500 17 53 170
5,000 24 75 240
10,000 34 107 340
25,000 54 171 540
50,000 -- -- 780
100,000 -- -- 1,160

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Table D. Approximate Standard Errors of Estimated Totals for Population Characteristics of Type III

Size of estimate (000) Standard error (000) for data based on:
1 in 100 sample 1 in 1,000 sample 1 in 10,000 sample
25 3 6 25
50 4 12 40
100 5 17 50
250 8 27 80
500 12 38 120
1,000 17 54 170
2,500 27 85 270
5,000 38 119 380
10,000 53 167 530
25,000 82 259 820
50,000 111 352 1,110
100,000 -- -- 1,440

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