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 ...

This is a preview. Log in through your library . Abstract The mean and the variance of a random sample are independently distributed if and only if the parent population is normal. This ...