This applet allows users to specify a hypothesized population proportion, sample proportion and sample size as well as an alternative hypothesis and significance level. After changing the values, the ...

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

If you're like I am, you probably find the statistics associated with the COVID-19 virus to be contradictory and confusing – a bewildering patchwork of testing programs initiated by cities, counties ...