Types of Random Variable:
Random variables are classified into two types namely discrete and continuous random
variables.
Discrete random variable
A variable which can assume finite number of possible values or an infinite sequence of countable real numbers is called a discrete random variable.
Examples of discrete random variable:
- Marks obtained in a test.
- Number of red marbles in a jar.
- Number of telephone calls at a particular time.
- Number of cars sold by a car dealer in one month, etc.,
Continuous random variable
A random variable X which can take on any value (integral as well as fraction) in the
interval is called continuous random variable.
Examples of continuous random variable
- The amount of water in a 10 ounce bottle.
- The speed of a car.
- Electricity consumption in kilowatt hours.
- Height of people in a population.
- Weight of students in a class.
- The length of time taken by a truck driver to go from Chennai to Madurai, etc.
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