Stats Cheat Sheet2 - Experiment an activity or process that...

Experiment – an activity or process that whose outcome is
subject to uncertainty. That is, experiment lead to random
outcomes.
Sample Space – the set of all possible outcomes of an
experiment, denoted by S.
Event – any collection (subset) of outcomes of interest
denoted by a capital letter. Event is a subset of the sample
space. Events can be simple (consists of exactly one outcome)
or compound (consists of more than one outcomes).
Complement of an event A – denoted by A ’ , is the event that
A does not occur. A ’ = { x | x ! ∈ A}
Union of two events A and B – denoted by A ∪ B, is the event
that either A or B occurs, or they both occur. That is, at least
one of the events occur. A ∪ B = {x | x ∈ A or x ∈ B}
Intersection of two events A and B – denoted by A ∩ B, is the
event that both A and B occur simultaneously.
A ∩ B = {x | x ∈ A and x ∈ B}
Null event – denoted by Ø, consists of no outcomes.
Two events A and B are said to be mutually exclusive or
disjoint if A ∩ B = Ø so that they have no outcomes in
common.