Chapter 5 Flashcards
Probability
1
Q
Probability of an event=
A
number of ways it can occur/total number of possible outcomes
2
Q
Properties of probabilities
A
always between 0-1, add to 1
3
Q
complement rule
A
the probability of event A not happening=1-P(A)
4
Q
Law of large numbers
A
after many trials, the relative frequency of outcomes will approach their probability
5
Q
simple addition rule
A
or means add (unions)
6
Q
P(AuB)=
A
P(A)+P(B)-P(AnB)
7
Q
Mutually exclusive (disjoint)
A
when events have no intersection, they cannot both occur, P(AnB)=0
8
Q
condition
A
a “given”
9
Q
P(A|B)=
A
P(AnB)/P(B)
10
Q
independence
A
knowing the outcome of one event does not affect the probability that the other event will occur, P(A|B)=P(A)
11
Q
P(AnB)=
A
P(A)xP(B|A)
12
Q
successive
A
events that happen one after the other
13
Q
A
