Hi @MDrake,
The typical way in JMP to perform a paired t-test using the Matched Pairs platform, which is available under Analyze > Specialized Modeling > Matched Pairs.
A less common way to perform the Paired t-test is using Fit Y by X just as you have before (with a continuous Y variable, and a continuous X variable), but before clicking the Red Triangle, hold down the Shift key on your keyboard. You will see the Paired T-test option now available in the menu. TheMatched Pairs platform has more options, but occasionally it's useful to run the Paired T-test through Fit Y by X.
I hope this helps,
@julian
![Fit Y by X matched pairs.gif Fit Y by X matched pairs.gif](https://community.jmp.com/t5/image/serverpage/image-id/12411i62BA520F556A524D/image-size/medium?v=v2&px=400)