Perform a z-test for a population mean. This calculator determines whether to reject the null hypothesis based on the sample mean, population mean, standard deviation, and sample size.
Perform a z-test for a population mean. This calculator determines whether to reject the null hypothesis based on the sample mean, population mean, standard deviation, and sample size.
Enter the sample mean
Enter the hypothesized population mean
Enter the population standard deviation
Enter the sample size
The test statistic z is the difference between the sample mean and hypothesized population mean divided by the standard error. Compare to critical values to determine significance.
How this calculator works
The test statistic z is the difference between the sample mean and hypothesized population mean divided by the standard error. Compare to critical values to determine significance.
Common questions about this calculator
