Explanation

A probability distribution lists all possible outcomes and their probabilities.

Requirements:

• Probabilities between 0 and 1

• Sum = 1

Example (rolling a die):
P(1) = 1/6, P(2) = 1/6, …, P(6) = 1/6

Quiz

1. What does a probability distribution show?

2. Can probabilities be negative?

3. Must the sum of probabilities equal?

4. Example of a probability distribution?

5. Are probabilities always fractions?

Answer Key

1. Outcomes and probabilities

2. No

3. 1

4. Rolling a die

5. No, can be decimals