Lesson 1 of 4: Learning Outcome

At the end of this lesson, the learner should be able to:

1. Identify characteristics of a probability distribution.
2. Calculate the mean, variance and expected value of a discrete probability distribution.

Lesson 2 of 4: Introduction to Discrete Probability Distribution (10mins)

What is a Discrete Probability Distribution?

Discrete Random Variable is one that takes on countable values.

Discrete Probability Distribution is a table that shows each value of random variable and its probability of occurrence.

Characteristics of a Discrete Probability Distribution

• The probability of a particular outcome is between 0 and 1 inclusive.
• The outcomes are mutually exclusive.
• Sum of the probabilities of the outcomes is equal to 1.

Knowledge Check

Since sum of probability is not 1, it is NOT a discrete probability distribution function.

Lesson 3 of 4: Mean and Variance of a Probability Distribution (10mins)