Apologies for cross-posting.
Some time ago, I sent a set of macros to the list which can be used
to calculate confidence intervals for proportions and their
differences using good, closed-form methods.
These algorithms for confidence intervals for the single proportion,
the difference between two independent proportions, and the
difference between two proportions for paired data, are now available
at my web address
http://www.uwcm.ac.uk/uwcm/ms/Robert.html
Two sets of macros are available, designed to supplement the
capabilities of SPSS and Minitab. Please feel free to download, use,
and share with colleagues!
Robert Newcombe.
..........................................
Robert G. Newcombe, PhD, CStat, Hon MFPHM
Senior Lecturer in Medical Statistics
University of Wales College of Medicine
Heath Park
Cardiff CF4 4XN, UK.
Phone 01222 742329 or 742311
Fax 01222 743664
Email [log in to unmask]
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|