Yates correction for continuity for 2x 2tables , Operation Research

Yates Correction for Continuity for  2x 2Tables

If any cell frequency in  2x 2 table isles  than 5thenfor the application of X2 test it  is pooled with the preceding or succeeding frequency so that total  become greater than 5. This will  decrease the degree freedom. Since for 2x2 table  the degree of freedom is equal 1 and  the degree of  freedom  after adjusting for pooling would  be equal to ( 1-1) zero. This  is absurd because  we must  have  at least 1 degree of freedom for application of x2 test.

In such situation we apply  Yates correction for  continuity. Thus by  adding 0.5 to the  cell frequency which is  less than  5 and adjusting the  remaining frequencies accordingly because the totals  of rows and columns are fixed in 2x2 contingency table the value  of X2 after applying Yates correction will be .

X2= N( |ad -b c|-N c)2/ (a + c) (b + d) (a+ b) ( c + d)

Where |ab - bc | is the  absolute value  of deviation after  ignoring negative  sings if any.

You should remember Yates correction for continuity  =  1 and N is small.

Is  applied  only when  the degree of  freedom is.

Posted Date: 2/26/2013 11:39:00 PM | Location : United States







Related Discussions:- Yates correction for continuity for 2x 2tables , Assignment Help, Ask Question on Yates correction for continuity for 2x 2tables , Get Answer, Expert's Help, Yates correction for continuity for 2x 2tables Discussions

Write discussion on Yates correction for continuity for 2x 2tables
Your posts are moderated
Related Questions
role of computer software in operation research


#question.A paper mill produces two grades of paper viz., X and Y. Because of raw material restrictions, it cannot produce more than 400 tons of grade X paper and 300 tons of grade


Probability and Non  Probability Sampling The following s are some  of the  considerations for the  selection  of probability  an non  probability  sampling. 1.Sometimes p

ABC Bank faces a decision to hire two clerks or lease two automatic teller machines. Service rates of clerk 1 and clerk 2 are 41 customers per hour and 36 customers per hour respec

Research and Development: All intellectual activities consciously pursued and systematically completed generate useful information. Research (also Research and Development) is

Anthology or Book with Articles  or Works by Many Authors   The name  of the person  compiling the book  will be  given  followed  by the  word editor. For more  than one  edit

Preparation of visual Aids ,Handouts and Feedback Forms It is   always  better to prepare  visual  aids much  in advance of the presentation. Leaving  them for the  last mo

factors affecting tha transportation cost