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This Z-test calculator is a tool that helps you perform a one-sample Z-test on the population's mean. Two forms of this test - a two-tailed Z-test and a one-tailed Z-tests - exist, and can be used depending on your needs.
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This Z-test calculator computes data for both one-sample and two-sample Z-tests. It also provides a diagram to show the position of the Z-score and the acceptance/rejection regions.
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The Z test checks if the expected mean is statistically significant, based on a sample average and a known standard deviation. The tool also compares the sample data to the standard deviation, calculates the test power, checks data for normality and draws a histogram and a distribution chart.
StatsTurtle provides a p-value calculator for a Z-statistic that also interprets your p-value and critical value and presents a visual chart.
Z-Test Calculator. This z-test calculator is very similar to the z-test function on the TI 84 calculator for conducting hypothesis tests when the population standard deviation is known.
These Z test formulas allow you to calculate the test statistic. Use the Z statistic to determine statistical significance by comparing it to the appropriate critical values and use it to find p-values.
