Z Test Statistics Calculator

In statistics, a test used to compare the two means and find if they differ from each other, for a large sample size with known variance value is called as z test. This is an online calculator to find the z-score for a set of data with the standardized random variable, population mean and standard deviation.

In statistics, a test used to compare the two means and find if they differ from each other, for a large sample size with known variance value is called as z test. This is an online calculator to find the z-score for a set of data with the standardized random variable, population mean and standard deviation.

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Formula:

Z Test Statistics Value = (X-µ) / σ Where, X = Standardized Random Variable µ = Population Mean σ = Population Standard Deviation

Example:

Perform the z test for data set 1,2,3 with standardized random variable as 3.

Step 1 :

The population mean is 2 and population SD is 0.8165.

Step 2 :

Z score = (3-2) / 0.8165 = 1.2247

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