8-3: probability and probability distributions english casbarro unit 8

8-3: Probability and 8-3: Probability and Probability Probability

DistributionsDistributions

8-3: Probability and 8-3: Probability and Probability Probability

DistributionsDistributionsEnglish CasbarroEnglish Casbarro

Unit 8Unit 8

Probability and Odds

An event that can never occur has a probability of 0.

An event that will definitely occur has a probability of 1.

All other probabilities are numbers between 0 and 1.

Definition of Odds

Odds are another way to show how likely an event is to be a success.

Probability has success: total (both success and failure)

Odds has success: failure (you would add them together to show the total number of events)

Probability Distribution (the total of all entries is 1)

A probability distribution for a particular random variable is a function that maps the sample space to the probabilities of the outcomes in the sample space.

A distribution where all of the probabilities are the same is called a uniform distribution.

Notice that all probability distributions add up to 1.

This is a frequency distribution of an experimental sample space that we can use to make a probability distribution.