5. Probability Flashcards
1
Q
What are mutually exclusive and independent events?
A
Mutually exclusive: when events have no outcomes in common, do not overlap in a Venn diagram, P(A or B) = P(A) + P(B)
Independent events: when one event has no effect on another, P(A and B) = P(A) X P(B)
2
Q
Why are tree diagrams used?
A
To show the outcomes of two or more events happening in succession
3
Q
What is the difference between P(A U B) and P(A n B)?
A
P(A U B): Both A and B added together
P(A n B): Just the intersection between A and B
4
Q
What is P(A’)?
A
The probability of everything but A
5
Q
What is a random variable?
A
Respresents a single experiment
Consists of outcomes with a probability for each
