Need help with the appropriate statistical method

Hi there,

I need to do a statistical analysis on the performance of day shift vs. night shift workers. The criteria used to compare the mean or median are as follows:

Rework Defects Quantity Produced


The sample size for day and night shifts are not equal. The data does not follow a normal distribution.

What is the best statistical technique to use?


Active Member
Are you saying that you need to perform comparison of Performance between Day and Night? What are the data? Please spend your time to describe the project well.