Case Study - Relative Risk and Odds Ratio. John Snow’s Cholera Investigations. Population Information. 2 Water Providers: Southwark & Vauxhall (S&V) and Lambeth (L) S&V: Population: 267625 # Cholera Deaths: 3706 L: Poulation: 171528 # Choleta Deaths: 411.
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Case Study - Relative Risk and Odds Ratio
John Snow’s Cholera Investigations
Table C gives probabilities for various n and p. Note that for p > 0.5, use 1-p and you are obtaining P(X=n-k)
Note that the distribution of Relative Risks is not normal
Note that distribution of ln(RR) is approximately normal