Probability
How likely something will happen.
Impossible
can’t happen
Certain
Will definitely happen.
Likely
Will probably happen; more than 50/50 but less than certain.
Unlikely
Will probably not happen; less than 50/50 but more than impossible.
50/50 chance
Even chance that either of 2 outcomes will happen.
sample space
All the possible outcomes in an experiment.
Outcome
Possible result of an experiment.
Experiment
Something you do over and over that has a certain set of possible results.
conditional probability
Any time you have dependent events.
Dependent
One event is affected by another event.
Independent
When the outcome of one event has no effect on future outcomes.
probability experiment
is a chance process that leads to well-defined results called outcomes.
outcome
is the result of a single trial of a probability experiment.
sample space
is the set of all possible outcomes of a probability experiment.
tree diagram
a device consisting of line segments emanating from a starting point and also from the outcome point. It is used to determine all possible outcomes of a probability experiment.
event
consists of a set of outcomes of a probability experiment.
simple event
An event with one outcome
Compound event
The event of getting an odd number when a die is rolled
Classical probability
uses sample spaces to determine the numerical probability that an events will happen.
Equally likely events
are events that have the same probability of occurring.
complement of an event E
is the set of outcomes in the sample space that are not included in the outcomes of event E.
Venn diagram
Probabilities can be represented pictorially
empirical probability
is that classical probability assumes that certain outcomes are equally likely (such as the outcomes when a die is rolled), while empirical probability relies on actual experience to determine the likelihood of outcomes.
