User blog comment:Cercospora/Effects of Luck on Accuracy for CV shelling (Pre Aircraft Proficiency)/@comment-24921408-20151126001608

I'd like to point out that at your sample size, Zuikaku's 80% hit rate has a bound of 77.00%-82.72% (90% confidence) and Shoukaku's 75.91% hit rate has a bound of 72.85%-78.69%, so it is on the brink of being significant, but not quite, especially if we bring it to 95% confidence: Zuikaku: 76.41%-83.23% vs Shoukaku: 72.25%-79.22%

As for the evasion of 40-55 rates, at 90% confidence, Zuikaku's hit rate is 66.08%-74.54%, while Shoukaku's hit rate is 58.81%-67.32% so once again, on the brink of being significant. If we take 95% confidence, then: Zuikaku: 65.22%-75.30% vs Shoukaku: 57.97%-68.11%.

So overall, you can't say "very likely" nor even "likely", but just "plausible". There seems to be promise, but not enough significance.

(If you're interested in the way I calculate the bounds and confidence intervals, I've made an article explaining it here.)