Keej,
Non-MMR Group
1) Being human with genes.
2) 95,000
3) can’t know who would’ve been triggered by genetics anyways.
4) can’t calculate without #3.
Regarding #3, that’s the whole point of the study. We’re starting with the asssumption that autism is caused by either MMR or genetics or both. If someone in the non-MMR group had autism, then we assume it was triggered by genetics (because that’s the only possibility, based on our asssumptions). So we do have all the numbers we need, and therefore we can calculate #4.