Z-test Calculator

Two-sided test for an independent normal sample with known population SD.

Your workbenchInputs are not stored

Result

Enter your values and run the tool to see your result.

Check the units, enter your values, and run the tool. Results follow the assumptions and method below.

Z statistic(mean-nullMean)/(sigma/sqrt(n))

Two-sided p-value1-erf(abs((mean-nullMean)/(sigma/sqrt(n)))/sqrt(2))