If you enter raw data, the tool will run the Shapiro-Wilk normality test and calculate outliers, as part of the test calculation.
Header: You may change groups' name to the real names.
Data: When entering data, press Enter after each value.
You may copy data from Excel, Google sheets or any tool that separate data with Tab and Line Feed.
Copy the data, one block of 2 consecutive columns includes the header, and paste below.
It is okay to leave empty cells, empty cells or non numeric cells won't be counted
|Normal distribution - the F test for variances is very sensitive to the normality assumption.|
|S1,S2 -Sample standard deviations of group1 and group2|
|n1,n2 - Sample size of group1 and group2|
The following R code should produce the same results:
Currently, there is no direct R function for the two-sample z test.