distributions Flashcards
1
Q
Bernoulli Mean
A
p
2
Q
Bernoulli Variance
A
p(1-p)
3
Q
Binomial Probability Mass Function
A
n!/x!(n-x)! p^x(1-p)^(n-x)
4
Q
Binomial Mean
A
np
5
Q
Binomial Variance
A
np(1-p)
6
Q
Poisson Probability Mass Function
A
e^-λ*(λ^x/x!)
7
Q
Poisson Mean
A
λ
8
Q
Poisson Variance
A
λ
9
Q
Hypergeometric Probability Mass Function
A
(R choose X)*(N-R choose n-x)
N choose n
10
Q
Hypergeometric Mean
A
nR/n
11
Q
Hypergeometric Variance
A
n(R/N)(1- R/N)(N-n/N-1)
12
Q
Geometric Probability Mass Function
A
p(1-p)^x-1
13
Q
Geometric Mean
A
1/p
14
Q
Geometric Variance
A
1-p/p^2
15
Q
Negative Binomial Probability Mass Function
A
(x-1/r-1) p^r(1-p)^x-r
