Ch.5 Probability Flashcards
what is an experiment?
a repeatable process that results in a number of outcomes
what is an event in statistics?
a collection of one or more outcomes
what is a sample space in a Venn diagram?
the set of all possible outcomes
what does A∩B mean for a venn diagram?
intersection
A and B
the middle of two circles overlapping
what does A∪B mean in venn diagrams?
Union
A or B
which is the whole of the 2 circles including their overlap
what does A’ mean in venn diagrams?
complement
not A
everything except the circle A
what are mutually exclusive events?
events with no common outcome
how would you calculate if events are mutually exclusive?
if
P(A or B) = P(A∪B) = P(A) + P(B)
what are independent events?
events with no effect on each other
how would you calculate if events are independent?
if
P(A&B) = P(A∩B) = P(A) x P(B)
