Basics
What is the probability?
The chance of something occuring (or close answers are accepted)
What is the formula for the union?
P(AUB) = P(A) + P(B) - P(A int B)
Which probability means "not in"?
Complement
What are the number ranges that probability can always be between?
Between 0 and 1
Write the formula on the board for P(A|B)
P(A int B)/P(B)
Which probability includes everything in A or B or both?
Union
What do we mean by an exhaustive set of events?
It covers every data point in the sample space
What is the multiplication rule formula?
P(A|B)*P(B) = P(A int B)
How do we prove two events are independent?
P(A|B) = P(A)
What is the value of the intersection when we have mutually exclusive event?
0
What is the combination formula and what is the difference between that and a permutation?
Order matters in permutaiton. Both have n! on the top and a
(n-r)! on the bottom. For combination you add the r! on there as well.
What is an example of a prior and posterior probability?
A regular probability of getting home with a gps versus the gps rerouting you based on prior information provided