I didn't combine data. It was already in the correct format. I can't say what you should do because I do not know what format your data currently uses. I used the Big Class sample data set. Here it is:
![Capture.JPG Capture.JPG](https://community.jmp.com/t5/image/serverpage/image-id/24936i713D33A1182DCA02/image-size/large?v=v2&px=999)
I analyzed the distribution of weight and used sex for the grouping variable.
Please let me know if this issue of preparing the data is still unclear.