Probability Flashcards
1
Q
P(A U B)
A
P(A) + P(B) - P(A n B)
2
Q
If A and B are independent, P(A n B) =
A
P(A) x P(B)
3
Q
P(B|A)
A
P(A n B) / P(A)
4
Q
If A and B are independent, P(A|B) = (two things)
A
P(A|B’) = P(A)
5
Q
If A and B are mutually exclusive, P(A U B) =
A
P(A) + P(B)
6
Q
How do you calculate the probability of X > Y?
A
1 - P(X =< Y)
7
Q
How do you calculate the probability of X =< Y?
A
P(X =< Y)
8
Q
How do you calculate the probability of X >= Y?
A
1 - P(X =< Y - 1)
9
Q
How do you calculate the probability of X < Y?
A
P(X =< Y - 1)
10
Q
What do you do to the significance level of a two tailed test?
A
Half it
