search for: blaker

Dear R Users, Is the p-value reported in a two-tailed binomial exact test in error or is it a feature? If it is a feature, could someone provide a reference for its two-tailed p-value computations? Using Blaker's (2000 - Canad. J. Statist 28: 783-798) approach,the p-value is the minimum of the two-tailed probabilities $P \left(Y\geq y_{obs}\right)$ and $P\left(Y\leq y_{obs}\right)$ plus an attainable probability in the other tail that is as close as possible to, but not greater than that one-tail...

Hi all, I have just uploaded a new package to the ftp site called exact2x2. The package does exact conditional tests for 2x2 tables. Specifically, it does Fisher's exact test and Blaker's exact test (see Blaker, 2000, Canadian Journal of Statistics, 783-798). The motivation for the package is to have inferences from p-values and confidence intervals match as much as is possible for the tests, so that when p<0.05 the 95 percent confidence interval on the odds ratio does not...

Hi all, I have just uploaded a new package to the ftp site called exact2x2. The package does exact conditional tests for 2x2 tables. Specifically, it does Fisher's exact test and Blaker's exact test (see Blaker, 2000, Canadian Journal of Statistics, 783-798). The motivation for the package is to have inferences from p-values and confidence intervals match as much as is possible for the tests, so that when p<0.05 the 95 percent confidence interval on the odds ratio does not...

...option paired=TRUE which gives an exact McNemar's test together with odds ratio estimates and confidence intervals. See vignette("exactMcNemar") for details. The original release is described in the paper: Fay, M.P. (2009). "Confidence intervals that match Fisher's exact or Blaker's exact tests" Biostatistics. doi:10.1093/biostatistics/kxp050. Let me know if there are bugs, comments or questions. Mike ****************************************************************** Michael P. Fay, PhD Mathematical Statistician National Institute of Allergy and Infectious Diseas...

...ce intervals when the number of counts are large and tsmethod="minlike". In addition to fixing the bug, the correction gives a much faster method for calculating the confidence interval. The package gives exact confidence intervals that match the p-values for Fisher's exact test and Blaker's exact test as well as giving an exact version of McNemar's test. For a description see: Fay (2010) R Journal 2(1):53-58. http://journal.r-project.org/archive/2010-1/RJournal_2010-1.html and Fay (2010) Biostatistics 11(2): 373-374. http://biostatistics.oxfordjournals.org/content/11/2/37...

...rho = true probability of success and n = # of trials. For x = # successes observed in n trials, p = x / n as usual. For p < 0.25 or p > 0.75, I use the proportion-based transformed confidence interval, as suggested by Moshe Olshansky. I used the Wilson interval, but some might prefer the Blaker interval. For p >= 0.25 or p <= 0.75, I use the standard chi-square based confidence interval (which is very conservative for this problem in this range). The composite method gives reliable results over a wide range of rho. This should suit the purpose until someone comes up with a more...

...option paired=TRUE which gives an exact McNemar's test together with odds ratio estimates and confidence intervals. See vignette("exactMcNemar") for details. The original release is described in the paper: Fay, M.P. (2009). "Confidence intervals that match Fisher's exact or Blaker's exact tests" Biostatistics. doi:10.1093/biostatistics/kxp050. Let me know if there are bugs, comments or questions. Mike ****************************************************************** Michael P. Fay, PhD Mathematical Statistician National Institute of Allergy and Infectious Diseas...

...ce intervals when the number of counts are large and tsmethod="minlike". In addition to fixing the bug, the correction gives a much faster method for calculating the confidence interval. The package gives exact confidence intervals that match the p-values for Fisher's exact test and Blaker's exact test as well as giving an exact version of McNemar's test. For a description see: Fay (2010) R Journal 2(1):53-58. http://journal.r-project.org/archive/2010-1/RJournal_2010-1.html and Fay (2010) Biostatistics 11(2): 373-374. http://biostatistics.oxfordjournals.org/content/11/2/37...

fyi, hg log | head -n 7 | grep changeset changeset: 10074:1d2d55d9779e @ LOGIN via Tbird ... Oct 15 11:22:35 master: Error: service(imap-login): Too large auth data_size sent Oct 15 11:22:35 imap-login: Info: Disconnected: Shutting down (auth failed, 1 attempts): user=<blakers at mx.pgnetwork.net>, method=PLAIN, rip=192.168.1.4, lip=192.168.1.14, TLS