File:Birthday paradox approximation.svg
Summary
| Description |
English: A graph comparing the accuracy of an approximation of the probability that in a room with n people (shown along the horizontal axis), some two (or more) will share a birthday. The black line, represents the computed probability. The red line represents the approximation
Español: Comparación entre la probabilidad de que dos personas (o más) en un cuarto compartan su cumpleaños (línea negra) y la aproximación: |
| Date | |
| Source | Own work |
| Author | Nicoguaro |
| SVG development | |
| Source code | Python code#from __future__ import division # Python 2
import numpy as np
from scipy.special import perm
import matplotlib.pyplot as plt
from matplotlib import rcParams
rcParams['font.family'] = 'serif'
rcParams['font.size'] = 14
num = np.linspace(1, 100, 100)
p = 1 - perm(365, num)/365.**num
p_approx = 1 - np.exp(-num**2/730)
plt.figure(figsize=(8, 5))
plt.step(num, p, "k", lw=2)
plt.plot(num, p_approx, "r", lw=1)
plt.xlabel(r"Number of people - $n$")
plt.ylabel("Probability of a pair")
plt.grid(True)
plt.legend([r"Probability: $\frac{365!}{365^n (365 - n)!}$",
r"Approximation: $1-e^\frac{-n^2}{2\cdot 365}$"], loc=4)
plt.savefig("Birthday paradox approximation.svg")
plt.show()
|
Licensing
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