The previous sections have addressed the question of whether there is an association between the rows and columns of a 2 × 2 table. In addition, you may be interested in describing the association in the table. For example, once you have established that the proportions computed from a table are different, you may want to estimate their difference.
Consider the following table, which displays data from two independent groups:
|Group 1||n11||n12||n1+||p1 = n11/n1+|
|Group 2||n21||n22||n2+||p2 = n21/n2+|
If the two groups are simple random samples from populations with corresponding probabilities Yes denoted as π1 and π2, you may be interested in estimating the ...