Random variable
A variable that can take on any of a set of values within a range.
Probability distribution
The set of probabilities of a random variable taking on each value within its
range of possible values.
Population
The set of all possible observations of a random variable
Sample
A subset of all possible observations of a random variable.
Observation
An instance of a random variable taking on a value.
Discrete random variable
A random variable that can only take on certain values within a range.
Continuous random variable
A random variable that can take on any value within a range.