Which test should I use? (rate of defectives for two machines)

Ian

New member
Joined
Oct 22, 2016
Messages
1
Hi, can anyone give me a push in the right direction withthis question please?
A machine produces items. The quality of each item is rated either 1, 2 or 3.
A second machine does the same.
If I take the average quality rating of 100 items from eachmachine, and I want to test whether the difference between them is significant(i.e. is one machine producing significantly better items than the other?),what is the most appropriate statistical test to use?

Thanks,
Ian.


 
Top