1 / 3

Conditional Probability

Conditional Probability. “Given X, what is the probability of Y” Example: You’re picking one person at random from the class. G iven the person in the class is a female, what the the probability he or she is blonde? What statisticians would write: P(Blonde | Female)

norman
Download Presentation

Conditional Probability

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Conditional Probability • “Given X, what is the probability of Y” • Example: You’re picking one person at random from the class. Given the person in the class is a female, what the the probability he or she is blonde? • What statisticians would write: P(Blonde | Female) • Tips: your total (n, or the number you divide by is only the girls! Not the whole class) • (# of blondes/#of girls)

  2. From your pset! • Given your cloth is from a hand loom, what is the probability • that the quality is poor? • Locate Handloom cloth • How many total pieces are there made by a hand loom? • How many of those are of poor quality?

  3. Hints for solving Probability word problems • When there is already a table, diagramming a tree is unnecessary • Be careful to take the right total (n, denominator) • Especially in conditional probabilities! • The simplest example of a conditional probability is the blonde | woman example we did above, store that in your head for easy reference, and so you’re not intimidated by the “ | “

More Related