39 lines
1.3 KiB
Markdown
39 lines
1.3 KiB
Markdown
# exploratory data analysis and models on the epi dataset
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date: 2025-10-13
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## dataset and choices
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- **file**: `epi_results_2024_pop_gdp_v2.csv`
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- **region column**: `region`
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- **response var**: `EPI.new`
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- **regions**: `Sub-Saharan Africa` vs `Latin America & Caribbean`
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## 1) variable distributions
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### 1.1 boxplots and histograms (with density!)
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### 1.2 qq plot (two-sample)
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## 2) linear models
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### full: EPI.new ~ gdp
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### full: EPI.new ~ gdp + population
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### 2.2 same models on one region (comparison)
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on region `Sub-Saharan Africa`, the better model is **region Sub-Saharan Africa: EPI.new ~ gdp + population** (r²=0.361, aic=265.4, bic=272.7).
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## 3) classification (knn, label = region)
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### model A
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- **k**: 5 | **accuracy**: 0.5581 | **test n**: 43
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variables: `c("AGR.new", "AIR.new", "APO.new")`
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### model B
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- **k**: 5 | **accuracy**: 0.5116 | **test n**: 43
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variables: `c("BCA.new", "BDH.new", "CBP.new")`
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