Samsati: falls away.
Samsaya: doubt.
Thum: anything packed in a bag.
Thum-ti: anything cut into pieces.
via A Tibetan-English Dictionary (1908)
In science we study numbers much much much smaller, and when doing so we compare relative difference.
So in this case let's pretend we are discussing specifically voting against party lines of the two parties in the impeachment trial. We ignore all the numbers not related to this study, 99.3% of the data is not within the scope of our study.
All we are left with is 2% of republicans did not vote YES. 3.9% of democrats did not vote YES. The difference is certainly statistically significant: democrats are 51% more likely to vote outside of party lines than republicans. That's more than double.
observing and hypothesizing