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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.
Two Sample Z-Test Calculator. A two sample z-test is used to test whether or not the means of two populations are equal when the population standard deviations are known. To perform a two sample z-test, simply fill in the information below and then click the “Calculate” button.
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.
The two-way z-test calculator provides a p-value, confidence interval, effect size, test power, outliers, distribution chart, and a histogram.
A two proportion z-test is used to test for a difference between two population proportions. The test statistic is calculated as: z = (p 1 -p 2) / √ (p (1-p) (1/n1+1/n2) where: p = total pooled proportion. p 1 = sample 1 proportion. p 2 = sample 2 proportion. n 1 = sample 1 size.
This calculator allows to run a z-test for two means, showing all the steps. The z-test is very similar to a t-test, but with a clear difference that for the case of a z-test we need to know the corresponding population standard deviation.
Here you can quickly determine the critical value (s) for two-tailed tests, as well as for one-tailed tests. It works for most common distributions in statistical testing: the standard normal distribution N (0,1) (that is when you have a Z-score), t-Student, chi-square, and F-distribution.
Our Two Sample Z Test Calculator is your trusty tool in this statistical journey. Ideal for situations like evaluating differences in customer preferences, academic performance, or any other scenarios where you have two separate data sets. Let’s unlock the secrets of Z testing together!
Z-test Calculator Sample Mean: Population Standard Deviation: Sample Size: Population Mean: Alternative Hypothesis: Greater Than Less Than Not Equal To Level of Significance (α): Tail Type: One-Tailed Two-Tailed Calculate
A Z-score calculator that measures whether two populations differ significantly on some single, categorical characteristic.