Probability Flashcards
1
Q
How to get a P when all outcomes are equally likely?
A
- Write out sample space
- count each outcome that is a “yes” to your question
- divide #of yes’s by total sample space
2
Q
What is S?
A
The sample space: a complete list of all possible outcomes
3
Q
What is (A n B)
A
the Probability of A and B (i.e. said yes to both A and B)
4
Q
what is (A u B)
A
Probability of A or B (ie said yes to AT LEAST one question)
5
Q
what is a complement
A
Everything that is not included in an event
6
Q
Neither Nor is
A
The opposite of OR (complement of AuB)
7
Q
What are proportions
A
Probabilities!
8
Q
Probability distributions will always add up to?
A
1! if you are given a prob distribution that does not add up to 1, then add up everything to get the total anyway. Divide each cell by the total to get the real distribution. Unless they are asking what ones are viable then its just wrong lmao
