Table C. Approximate Standard Error of Estimated Number of Persons.

Estimated Number of Persons	Standard Error
100	100
200	140
300	170
500	220
700	260
1,000	320
2,000	450
3,000	550
5,000	710
7,000	840
10,000	1,000
20,000	1,400
30,000	1,700
50,000	2,200
70,000	2,600
100,000	3,200
200,000	4,500
300,000	5,400
500,000	7,000
700,000	8,200
1,000,000	9,800
2,000,000	14,000
3,000,000	16,000
5,000,000	20,000
7,000,000	22,000
10,000,000	24,000
12,000,000	24,000