Day 7: Probability

October 16, 2008 by  
Filed under 10-Day Tour

 Moving from describing events to predicting their likelihood involves probabilities, odds, and the use of Fisher’s F test. Probabilities compare of an event to the total number of possible events (4 aces out of 52 cards equals a probability of .077). Odds compare sides: 4 aces in a deck against 48 cards that aren’t aces (which equals odds of 1:12).

Analysis of Regression (ANOR) is an application of probability to linear regression. The ANOR uses a F-test, which is a ratio of variances. It is the ratio of understood variance to unexplained variance. To find the likelihood that a regression can be explained by a straight line, the number derived from an F test is compared to a table of probabilities. If the value you calculated is bigger than (or equal to) the value in the book, the pattern you see in the data is unlikely to be due to chance.

  

NOW YOU CHOOSE:
    Day 7: Probability
    
Bit More About Probability
    Even More About Probability
    Even More About ANOR
    Calculate ANOR
    Practice Problems
    More Practice Problems
    Word Problems
       
Sim1       Sim2        Sim3
    Basic Facts About Probability
     Audio: Lectures
    Vocabulary
    Formulas
    Quiz 7
    Summary

Comments

3 Responses to “Day 7: Probability”

  1. Risky Business : StatNut.com on July 18th, 2009 3:24 am

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  3. Deal Or No Deal : StatNut.com on July 18th, 2009 3:24 am

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