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 |

应用统计方法，包括描述性统计、趋势分析、异常值检测和假设检验。在分析分布、测试显着性、检测异常、计算相关性或解释统计结果时使用。 来源：anthropics/knowledge-work-plugins。