Observation
The action or watching something (or someone) carefully, in order to gain information.
Percent
A ratio comparing a number to 100.
Ratio
A comparison of part to whole (part of the total number in ratio to total number) written as a fraction.
Complement
The opposite of the desired event.
Compound Event
An event made up of two or more simple events.
Event
An outcome or set of outcomes of an experiment or situation.
Perform Experiment
Any activity based on chance, such as tossing a coin.
Experimental Probability
The ratio of the number of times an event occurs to the total number of trials, or times that the activity is performed.
Total Outcomes
All possibilities that result from an experiment.
Simple Event
An event consisting of only one outcome.
Experiment
A model of a simulation, often one that would be too difficult or too time-consuming to actually perform.
Trial
Each repetition or observation of an experiment.
P(event )
A number from 0 to 1 (or 0% to 100%) that describes how likely an event is to occur.
Data
Facts and statistics collected together for reference or analysis.
Sample Space
The set of all possible outcomes
Theoretical probability
Probability based on reasoning written as a ratio of the number of favorable outcomes to the number of possible outcomes.
Relative Frequency of Outcomes
The ratio of the number of times an event occurs in a series of trials of a chance experiment to the number of trials of the experiment performed.
Chance
The random outcomes of a given event.
Outcome
Another word for "event
Probability
The chance of an event happening that is represented as a ratio, decimal, or percent