chi-squared function - Hutchinson encyclopedia article about chi-squared function Printer Friendly
Dictionary, Encyclopedia and Thesaurus - The Free Dictionary
1,885,592,251 visitors served.
forum mailing list For webmasters
?
New: Language forums
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

chi-squared function

    0.01 sec.

chi-squared function

Function that in probability theory provides a test for deviation from a null hypothesis. It is usually represented as being made up of:

(observed frequency of result − expected frequency of result)2/expected frequency of result

in which the top line indicates the (squared) deviation from the expected.



How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.
?Page tools
Printer friendly
Cite / link
 Email
Feedback
?Sign in SSL protected
Email:
Password:
Register

? Mentioned in ? References in periodicals archive
No references found
 
This can be achieved by plotting the cumulative chi-squared function which is the weighted sum of the squares of the difference between observed and calculated powder diffraction patterns up to that point in the diffraction pattern.
Powder diffraction: least-squares and beyond by David, W.I.F. / Journal of Research of the National Institute of Standards and Technology
More results
 
Hutchinson browser? ? Full browser
 
 
Hutchinson Encyclopedia
?

Disclaimer | Privacy policy | Feedback | Copyright © 2010 Farlex, Inc.
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Terms of Use.