The calculator includes an explanation of inputs and outputs. This web calculator conducts a z-test for the difference between two populations' proportions. The calculator includes a video definition, ...

This web calculator allows users to specify a hypothesized population proportion, sample proportion and sample size. After finishing the steps, the calculator will show the resulting z-score and the p ...

The two-proportions test ... and normally distributed z distribution. An Alpha risk of 5 percent (or 0.05) corresponds to a critical value of +/-1.96 for a two-tailed test. Since -0.69 is bigger ...