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Colloquium Series, Department of Statistics, University of Toronto

Topic:    Exact Confidence Intervals, Based on the Z Statistics, for the
          Difference Between Two Proportions
Speaker:  Andrew P. Soms
          Center for the Mathematical Sciences
          University of Wisconsin-Madison and the University of Wisconsin -
          Milwaukee
Date:     Thursday, April 6, 1989    4:00 p.m.
Place:    Room 2108, Sidney Smith Hall, 100 St. George St., U of T
Abstract:
  
   We show that the confidence interval version of the extended exact uncon-
ditional Z test of Suissa and Shuster (1985) for testing the equality of two
binomial proportions is due to general results of Buehler (1957), Sudakov and
references cited there (1974), and Harris and Soms (1984).  We apply these 
results to obtain exact unconditional confidence intervals for the difference
between two proportions, deriving an explicit solution for special outcomes,
make some comments on Buehler's (1957) method, and compare the P levels of the
Z test and Fisher's exact test.

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Coffee and tea will be served in the De Lury Lounge (SS6006) at 3:30 p.m.