I didn't add this new (rock) data to the old ones, but I tested it alone. z = 0.91 (p-value = 0.363). For the third time, results suggests that Rock, unlike Steel, get the same proportions for both Cave and Mountain. I guess it's enough for a veredict.
For dual types I bet that the proportions just get the simple average between the two types. That would be slightly higher than half for each individual type. Just a hunch though (I didn't test nor analyzed). Sableye or Spiritomb would be interesting to test as a result around 55% for manor would confirm this. Also Blaziken/Infernape/Emobar would be VERY interesting, as if my hunch is right, they would get the same results for mono Fire and mono Fight.
For Dragons and Normal, I'm wondering if they get exactly same proportion (statistically speaking) or if they prefer one area slightly than others. Let's say for example, does Normal has 20% for Forest and 16% for other areas or 16.67% for each area?
Dragon data we have some problems: the first data is previous to Ice Cave and the second is very short. Anyway, this is the least important data so, it's better to check it later.
I'm short on time right now, but I will perform more hypotesis tests for the current data later.
edit: Female Basculin-Blue