A z-test is statistical test used to determine whether two population means are different when the variances are known and the sample size is large. What Is a Z-Test? A z-test is a statistical test ...

The z test is a commonly used hypothesis test in inferential statistics that allows us to compare two populations using the mean values of samples from those populations, or to compare the mean of one ...

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 ...