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Approximative formula for normal distribution being above threshold
Suppose that $X \sim \mathcal{N}(r + \frac{1}{N}, s) $ and $Y \sim \mathcal{N}(r, s)$ for some $r, s \approx 1$ and $N \approx 10^6$.
What are good approximate formulas for the quantity
$$\frac{ \...
2
votes
1
answer
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Assessing the efficiency of a single vote in a multiparty presidential election
In a country there is a voting system where all parties get represented in parliament if they meet a bar of $n$ percent.
Suppose that the parties are grouped into two groups of red $R_1, \dots R_k $ ...