statistical-analysis

Descriptive statistics, trend analysis, outlier detection, hypothesis testing, and guidance on when to be cautious about statistical claims.

Choose the right measure of center based on the data:

| Symmetric distribution, no outliers | Mean | Most efficient estimator | | Skewed distribution | Median | Robust to outliers | | Categorical or ordinal data | Mode | Only option for non-numeric | | Highly skewed with outliers (e.g., revenue per user) | Median + mean | Report both; the gap shows skew |

應用統計方法，包括描述性統計、趨勢分析、異常值檢測和假設檢定。在分析分佈、測試顯著性、檢測異常、計算相關性或解釋統計結果時使用。 來源：anthropics/knowledge-work-plugins。