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Hypergeometric Distribution Calculator

Calculate probabilities of the hypergeometric distribution step by step

The calculator will find the simple and cumulative probabilities, as well as the mean, variance, and standard deviation of the hypergeometric distribution.

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Your Input

Calculate the various values for the hypergeometric distribution with $$$N = 20$$$, $$$K = 15$$$, $$$n = 12$$$, and $$$k = 8$$$.

Answer

Mean: $$$\mu = n \frac{K}{N} = 12 \cdot \frac{15}{20} = 9$$$A.

Variance: $$$\sigma^{2} = n \frac{K}{N} \frac{N - K}{N} \frac{N - n}{N - 1} = 12 \cdot \frac{15}{20} \frac{20 - 15}{20} \frac{20 - 12}{20 - 1} = \frac{18}{19}\approx 0.947368421052632.$$$A

Standard deviation: $$$\sigma = \sqrt{n \frac{K}{N} \frac{N - K}{N} \frac{N - n}{N - 1}} = \sqrt{12 \cdot \frac{15}{20} \frac{20 - 15}{20} \frac{20 - 12}{20 - 1}} = \frac{3 \sqrt{38}}{19}\approx 0.973328526784575.$$$A

$$$P{\left(X = 8 \right)}\approx 0.255417956656347$$$A

$$$P{\left(X \lt 8 \right)}\approx 0.051083591331269$$$A

$$$P{\left(X \leq 8 \right)}\approx 0.306501547987616$$$A

$$$P{\left(X \gt 8 \right)}\approx 0.693498452012384$$$A

$$$P{\left(X \geq 8 \right)}\approx 0.948916408668731$$$A