Lubricating Oil

P99.6 [Nase Percentile]:
99.6% of resources spawned for Lubricating Oil have a quality grade lower than Nase

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P50 [50th percentile (Median)]:
When P50 appears, represents the median of a data set. It is the exact center point that divides the previously ordered data set into two equal halves: the 50% of the values is below this value and the remaining 50% above. If the data distribution is perfectly symmetrical (like a Gaussian bell), the P50 and the mean will be equal. However, if your data has outliers or is skewed, the P50 will show you the actual midpoint, while the mean will give you the arithmetic average.

P99.6 [Nase Percentile]:
This is a threshold on the probability curve. A Quality Grade at P99.6 means that, according to the model, only 0.40000000000001 % of resources are expected to be better than this level. It does not mean better resources already exist — it means this is the point where the probability of getting something higher drops significantly. Resources above P90 are in the top tier of what the model predicts is realistically possible.