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# Introduction to Probability

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Author: Kendra Wheeler
##### Description:

Common terms used in probability examples
Examples on the different terms
Demonstrate the rule of probability-- probability always has a value between 0 and 1.

Terms used when calculating probability.
Introduction to probability
The rule of probability
The three different kinds of probability of events
Examples of probability

co-author: Laura Kniffin

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Tutorial

## Terms

Experiment: Is a situation involving chance or probability that leads to the results.

Outcome: Is the result of a single trial of an experiment.

Probability: is the measure of how likely an event is.

A Random Sample is a sample from a population in which all of the individual values in the sample were selected according to their likelihood or probability in the population.

Sample Space: The concept in probability theory, which considers all the possible outcomes for an event or experiment.

Sample Point: A single possible outcome that is a member of the sample space.

Event: is any collection of outcomes in an experiment

Mutually Exclusive: Two events that cannot possibly occur together.  Example: A subject cannot be both brown eyed and blue eyed, nor can they be both tall and short, but a subject could be both brown eyed and short or both blue eyed and tall.

All Inclusive: The entire population. Your entire sample falls into one category. For example, the census includes all male and female, it does not exclude any category.

Probability with replacement: a sample of the probability data that is selected, observed, and then placed back into the population sample to possibly be drawn again.

Probability without replacement: a sample of the probability data is selected, observed, but then not placed back into the population sample.

## Probability Examples

Examples of experimental, theoretical and subjective probability.