User blog comment:Fujihita/Design of Experiment: 20.3cm (no.2) night battle accuracy bonus test/@comment-749631-20150919163315/@comment-25637142-20150920094327

Ideally speaking, a separate test using the 20.3cm vanilla or no.3 vs. a control gun (same visible acc bonus and confirm no fit bonus) should be conducted. Imo, it's beyond the scope of this study so we'll just assume they really do have NB bonus.

It's difficult to compare two guns with different visible acc bonus so a comparison between no.2 and vanilla cannot be done. Worst-case scenario, the visible bonus difference will invalidate any hidden fit acc bonus in the final p-test. So the test is designed to make indirect comparison.

I proposed using a recon seaplane (also +1 acc) to counter the acc difference but there were concerns that seaplane's acc bonus doesn't work at night. Whether it was baseless paranoia or not, it's still a bother to address the said concern atm.

And I have no idea about the red face and world 1-2. I'll look at the method later but the first thing I can say is that: getting ships to red face costs runs.