Table A-2. Standard Errors of Estimated Totals: Completions in 1985
(2 chances out of 3)

    Estimated     Standard      Estimated       Standard
        total        error          total          error

         5,000       1,430         75,000            5,720
        10,000       2,030        100,000            6,650
        15,000       2,500        150,000            8,310
        20,000       2,880        250,000           11,110
        25,000       3,240        350,000           13,590
        35,000       3,830        450,000           15,890
        50,000       4,620        600,000           19,180


Table B-2. Standard Errors of Estimated Percentages: Completions in 1985
(2 chances out of 3)

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

   5,000     4.0      6.3     8.5     11.4    12.4    14.3
  10,000     2.9      4.3     6.1      8.1     8.7    10.0
  15,000     2.3      3.5     5.0      6.6     7.1     8.2
  20,000     1.9      3.1     4.3      5.8     6.1     7.1
  25,000     1.8      2.7     3.9      5.2     5.5     6.4
  35,000     1.5      2.4     3.2      4.3     4.7     5.5
  50,000     1.3      1.9     2.7      3.5     3.9     4.5
  75,000     1.0      1.6     2.3      2.9     3.2     3.7
 100,000     1.0      1.5     1.9      2.6     2.7     3.2
 150,000     0.8      1.1     1.6      2.1     2.3     2.6
 250,000     0.6      0.8     1.3      1.6     1.8     2.1
 350,000     0.5      0.8     1.0      1.3     1.5     1.8
 450,000     0.5      0.6     1.0      1.1     1.3     1.5
 600,000     0.3      0.6     0.8      1.0     1.1     1.3