👉 Observatory Manual: 🎯 Lv 1-4 [Core Positioning]: Find the center of the star cluster! Calculate the arithmetic mean of X and Y: x and y. 🟩 Lv 5-8 [Covariance Matrix]: Positive vs Negative Energy! Calculate the sum of products of deviations Sxy. Note: "Negative times negative equals positive" generates green positive energy! 🌀 Lv 9-12 [Outlier Black Hole]: Calculate the correlation coefficient r, and observe how a single "outlier" can violently distort the overall correlation!
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