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Update cheat-sheet_reconcile.md

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Thinh Ha
2025-12-22 05:53:51 +01:00
parent 813dd4b5ee
commit 94a24e4411
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cheat-sheet_reconcile.md
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@@ -12,6 +12,13 @@ Ví dụ: [4,5,6] → **5** | [4,5,6,7] → (5+6)/2 = **5.5**
**Mode:** Giá trị xuất hiện nhiều nhất **Mode:** Giá trị xuất hiện nhiều nhất
Ví dụ: [4,5,5,6] → **5** Ví dụ: [4,5,5,6] → **5**
**Standard Deviation:** `σ = √[Σxi²/n - x̄²]`
Ví dụ: [4,7,10] → Σxi²=165, n=3, x̄=7
σ = √[165/3 - 7²] = √[55-49] = √6 = **2.45**
**Standard Deviation:** `σ = √[Σxi²/n - x̄²]`
Ví dụ: [2,4,6] → Σxi²=56, x̄=4, n=3 → √[56/3 - 16] = √2.67 = **1.63**
--- ---
### Boxplot ### Boxplot
@@ -126,10 +133,10 @@ Ví dụ: (2,3), (4,5), (6,7) → **(4,5)**
1. **Mean:** x̄ = Σxi/n 1. **Mean:** x̄ = Σxi/n
2. **Median:** Giá trị giữa 2. **Median:** Giá trị giữa
3. **Min-Max:** (x-min)/(max-min)×(b-a)+a 3. **σ (Std Dev):** √[Σxi²/n - x̄²]
4. **Z-Score:** (x-μ)/σ 4. **Min-Max:** (x-min)/(max-min)×(b-a)+a
5. **Modified Z-Score:** 0.6745×(x-median)/MAD 5. **Z-Score:** (x-μ)/σ
6. **σ:** √[Σxi²/n - x̄²] 6. **Modified Z-Score:** 0.6745×(x-median)/MAD
7. **Cov:** Σ(xi·yi)/n - x̄·ȳ 7. **Cov:** Σ(xi·yi)/n - x̄·ȳ
8. **r:** Cov(X,Y)/(σx×σy) 8. **r:** Cov(X,Y)/(σx×σy)
9. **Support:** Count/Total 9. **Support:** Count/Total