Stats: Venn diagrams Flashcards
1
Q
What is the meaning of P(B│A)?
A
The probability of B, given A has occurred/is true.
2
Q
If A and B are mutually exclusive, what is P(A u B)
A
P(A) + P(B)
3
Q
What is the meaning of AuB
A
Anything in either A or B
4
Q
If A and B are mutually exclusive, what is P(AnB)?
A
0 or empty set ∅
5
Q
If A and B are independent, what is P(AnB)?
A
P(A) x P(B)
6
Q
What is the meaning of AnB
A
Both A AND B
7
Q
If A and B are independent, what is P(B│A)
A
P(B) because it doesn’t affect B if A is true
8
Q
What is the formula for P(AuB)
A
P(A) + P(B) - P(AnB)
9
Q
What is the formula for P(AnB)?
A
P(A) x P(B│A)
