Z-Test Calculator

Z-Test Calculator

Calculate the Z statistic and two-tailed p-value for a hypothesis test.

* Enter the sample mean (\( \bar{x} \)), hypothesized population mean (\( \mu_0 \)), population standard deviation (\( \sigma \)), and sample size (\( n \)).

Formula: $$ z = \frac{\bar{x}-\mu_0}{\sigma/\sqrt{n}}. $$

Step 1: Enter Parameters

e.g., 105

e.g., 100

e.g., 15

e.g., 30

Formula: $$ z = \frac{\bar{x}-\mu_0}{\sigma/\sqrt{n}}. $$