This page computes various statistics from a 2-by-2 table. It will calculate a Yates-corrected chi-square, along with other quantities relevant to two special kinds of 2-by-2 tables:
Confidence intervals for the estimated parameters are computed by a general method given in: Statistical Methods for Rates and Proportions (2^{nd} Ed.) by Joseph L. Fleiss (Pub: John Wiley & Sons, New York, 1981)
Enter numbers into the four cells below. Make sure that the row and column totals add up correctly. Then click the Compute button.