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
Usefulness of Correlation 1.Correlation  is very  useful  to economists  to study  the relationship  between  variables  like  price  and quantity  demanded. To businessmen it

regression line drawn as Y=C+1075x, when x was 2, and y was 239, given that y intercept was 11. calculate the residual

Uses of Mode The  use of the mode is recommended in the following  situations: a.When a quick  and approximate measures of  central tendency desired. b.When the  measure

In a rectangular game, pay-off matrix of player A is as follows: i) Solve the game. ii) Write down the pay-off matrix of B and then, solve the game.

An electro-mechanical product for use in a vehicle has been in widespread use for some time and has proved popular with customers, in terms of its operational performance and price

The Neatee Eatee Hamburger Joint specializes in soyabean burgers. Customers arrive according to the following inter - arrival times between 11.00 am and 2.00 pm: Interval-arrival


Methods  of calculation of standard deviation a. Calculation of Standard  Deviation  - Individual Series: There  are two methods of calculating standard  deviation in an ind

Q2. Six Operators are to be assigned to five jobs with the cost of assignment in Rs. given in the matrix below. Determine the optimal assignment. Which operator will have no assign

Six Operators are to be assigned to five jobs with the cost of assignment in Rs. given in the matrix below. Determine the optimal assignment. Which operator will have no assignment