Table A-1. Standard Errors of Estimated Totals: Completions in 1986 to 2002
(2 chances out of 3)

    Estimated     Standard    Estimated       Standard
    total         error       total           error

     1,000          500        35,000          3,200
     2,000          800        50,000          3,800
     3,000          900        75,000          4,700
     4,000        1,100       100,000          5,400
     5,000        1,200       150,000          6,600
    10,000        1,700       250,000          8,500
    15,000        2,100       350,000         10,100
    20,000        2,400       450,000         11,400
    25,000        2,700       600,000         13,200



Table B-1. Standard Errors of Estimated Percentages: Completions 1986 to 2001
(2 chances out of 3)

              98      95        90       80       75       60
 Base of      or      or        or       or       or       or
percentage    2       5         10       20       25       40      50

   1,000      7.5    11.7      16.1     21.5     23.3     26.3    26.9
   2,000      5.3     8.3      11.4     15.2     16.5     18.6    19.0
   3,000      4.3     6.8       9.3     12.4     13.4     15.2    15.5
   4,000      3.8     5.9       8.1     10.8     11.6     13.2    13.4
   5,000      3.4     5.2       7.2      9.6     10.4     11.8    12.0
  10,000      2.4     3.7       5.1      6.8      7.4      8.3     8.5
  15,000      1.9     3.0       4.2      5.6      6.0      6.8     6.9
  20,000      1.7     2.6       3.6      4.8      5.2      5.9     6.0
  25,000      1.5     2.3       3.2      4.3      4.7      5.3     5.4
  35,000      1.3     2.0       2.7      3.6      3.9      4.5     4.5
  50,000      1.1     1.7       2.3      3.0      3.3      3.7     3.8
  75,000      0.9     1.4       1.9      2.5      2.7      3.0     3.1
 100,000      0.8     1.2       1.6      2.2      2.3      2.6     2.7
 150,000      0.6     1.0       1.3      1.8      1.9      2.2     2.2
 250,000      0.5     0.7       1.0      1.4      1.5      1.7     1.7
 350,000      0.4     0.6       0.9      1.1      1.2      1.4     1.4
 450,000      0.4     0.6       0.8      1.0      1.1      1.2     1.3
 600,000      0.3     0.5       0.7      0.9      1.0      1.1     1.1