Population
Number of items from which data might be collected
Sample
One or more observations about the population
Unbiased
Random
P(event)=
# of wanted outcomes over # of total outcomes
Impossible
0%
Unlikely
25%
As likely as not
50%
Likely
75%
Certain
100%
Outcome
A possible result of a probability experiment
Probability
likelihood that a particular event will occur
Theoretical Probability
What should occur or what we expect to happen in an experiment
Experimental probability
Probability-based on data from repeating an event (doing an experiment)
Complement
something that completes or makes up a whole
Random sample
a sample that fairly represents a population because each member has an equal chance of inclusion.
Bias
prejudice in favor of or against one thing, person, or group compared with another, usually in a way considered to be unfair.
Tree diagram
A diagram used to show the total number of possible outcomes
Equally likely
Outcomes that have the same probability
Representative
this kind of sample accurately reproduces the characteristics of the population a researcher is studying.