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.
Perform the z test for data set 1,2,3 with standardized random variable as 3.
The population mean is 2 and population SD is 0.8165.
Z score = (3-2) / 0.8165 = 1.2247