Table A-3. Standard Errors of Estimated Totals: Completions in 1970 to 1984
(2 chances out of 3)


    Estimated     Standard    Estimated      Standard
        total        error        total         error

      5,000         1,060        75,000         4,220
     10,000         1,500       100,000         4,910
     15,000         1,840       150,000         6,140
     20,000         2,130       250,000         8,210
     25,000         2,390       350,000        10,040
     35,000         2,830       450,000        11,750
     50,000         3,520       600,000        14,160


Table B-3. Standard Errors of Estimated Percentages: Completions 1970 to 1984
(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     3.0     4.6     6.3     8.4     9.2    10.6
  10,000     2.1     3.2     4.5     6.0     6.4     7.4
  15,000     1.7     2.6     3.7     4.9     5.2     6.1
  20,000     1.4     2.2     3.2     4.3     4.5     5.2
  25,000     1.3     2.0     2.9     3.8     4.0     4.8
  35,000     1.1     1.8     2.4     3.2     3.5     4.0
  50,000     1.0     1.4     2.0     2.6     2.9     3.3
  75,000     0.7     1.2     1.7     2.1     2.4     2.7
 100,000     0.7     1.1     1.4     1.9     2.0     2.4
 150,000     0.6     0.8     1.2     1.5     1.7     1.9
 250,000     0.5     0.6     1.0     1.2     1.3     1.5
 350,000     0.4     0.6     0.7     1.0     1.1     1.3
 450,000     0.4     0.5     0.7     0.8     1.0     1.1
 600,000     0.2     0.5     0.6     0.7     0.8     0.8