Probability Flashcards
1
Q
Empirical Probability
A
P(E) = # of times event E occurs /
total # of observed occurrences
2
Q
Theoretical Probability
A
P(E) = n(E) = # of outcomes in E /
n(S) = total # of outcomes in S
3
Q
P(A and B)
Independent events
A
P(A) • P(B)
4
Q
P(A and B)
Dependent events
A
P(A) • P(B | A)
5
Q
P(A’)
A
1 - P(A)
6
Q
P(A or B)
Not mutually exclusive
A
P(A) + P(B) - P(A and B)
7
Q
P(A or B)
Mutually exclusive
A
P(A) + P(B)
8
Q
P(B | A)
Conditional
A
P(A and B) /
P(A)
9
Q
P(A | B)
Conditional
A
P(A and B) /
P(B)
10
Q
P(B | A)
A
P(A)
