Two Proportion Z Test Calculator
Two Proportion Z Test: a planned Super Calculator tool. Covers successes and sample size per group, alpha and tail selection. Stub page. Not published yet.
Two Proportion Z Test Calculator is a planned calculator in the mathematics section of Super Calculator, covering statistics and probability.
What this calculator will compute
Inputs: successes and sample size per group, alpha and tail selection.
Outputs: proportions, difference, z, p value and confidence interval on the difference.
Formula, recorded as scope and not yet verified against a primary source: z = (p1 - p2) / sqrt(pbar(1-pbar)(1/n1 + 1/n2)) with pbar = (x1 + x2)/(n1 + n2) for the hypothesis test, but the unpooled standard error sqrt(p1(1-p1)/n1 + p2(1-p2)/n2) for the confidence interval on the difference.
Status
This page is a stub. The calculator is not built, no figure on this page has been verified against the authority that sets it, and nothing here should be used to make a decision. The page exists so that the site structure is complete and so that articles can link this concept on first mention.
The stub carries noindex, nofollow and is excluded from the sitemap.