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Calculate descriptive statistics with step-by-step breakdown. Population and sample formulas included.
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Quick Reference:
CV = (σ/μ) × 100%. It's a unitless measure of relative variability, allowing comparison across different scales. A CV < 20% typically indicates low variability.
Common methods: 1) Values > 1.5×IQR beyond Q1/Q3, 2) Values > 2-3 standard deviations from mean, 3) Z-scores > |3|. Choose based on your data distribution.
Neither is universally better. Mean uses all data but is sensitive to outliers. Median is robust to outliers but ignores actual values. Report both when data might be skewed.