What is a Random Variable?
What is a Random Variable?
A random variable can be defined as a numerical outcome of an experiment. Random variable is also called as random quantity, aleatory variable or stochastic variable. A set of all possible values of a random variable of a particular experiment is called a sample space. A random variable must be measurable so that the probabilities can be assigned to its potential values. Outcome of an experiment depends uncertain variable in environment.
There are two types of random variable:
Discrete Random Variable (DRV):
Discrete random variables can have only discrete values, it is always a whole number e.g. number of students(15, 16, 17), babies in the houses, etc.
Continuous Random Variable (CRV):
As the name suggests, CRV can have continuous values within the range. E.g height(160, 160.2, 160.26) temperature, weight, etc.
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