Distributions Flashcards
1
Q
What is the Discrete Uniform Distribution?
A
Probabilities of outcomes are all equal
2
Q
Binomial Distribution
A
X~B(n,p)
3
Q
When to use Binomial Distributions? [FFIT]
A
Fixed number of trials, n
Fixed probability of success, p
Independent trials
Two outcomes, success/failure
4
Q
Normal Distribution
A
Continuous Rando Variable, Y
Y ~ N(μ, σ^2/n)
5
Q
Standard Normal Distribution
A
Z~N(0,1)
6
Q
Standard Normal Distribution Z =
A
Z = (Y-μ)/σ
7
Q
σ =
A
squrRoot (np(1-p))
- approximating standard deviation
8
Q
μ =
A
np
- approximating mean
9
Q
Mean from Binomial Distribution
A
np
10
Q
Variance from Binomial Distribution
A
np(1-p)
11
Q
what is the actual significance level
A
probability of actually rejecting H0
probability of critical region
12
Q
How can you identify when something has a binomial distribution?
A
has two possible outcomes
