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

Assignment Help:

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.


Related Discussions:- Yates correction for continuity for 2x 2tables

the simplex method, In large sized linear programming problems, the ...

In large sized linear programming problems, the solution cannot be obtained by the graphical method and hence a more systematic method has to be developed to find

Components included in the reseach proposal, Components Included in the Pro...

Components Included in the Proposal Personnel In case the proposal is addressed to the funding agencies, the qualifications of the key project personnel for study should be

Sample survey methods:, Sample Survey Methods: If proposed investigati...

Sample Survey Methods: If proposed investigation is done  only on  a part taken  out of  universe then it  will be  known  as sample  survey. This  part of the universe is kno

Non measurable human factors, Operation research makes no allowance for in...

Operation research makes no allowance for intangible factors such as skill attitude vigor of the management people in taking decisions but in many instances success or fail

LPP, A paper mill prouduces two grads of paper viz., X and Y. Becouse of ra...

A paper mill prouduces two grads of paper viz., X and Y. Becouse of raw material restriction, it cannot product more then 400 tons of grade X paper and 300 tons of grade Y paper in

Decision trees, Ask questioA farmer intends to drill a well for his herd. I...

Ask questioA farmer intends to drill a well for his herd. In the past, only 80% of the wells drilled in this area were successful at 12 metres of depth. On finding no water at 12 m

Small sample - hypothesis testing , Small Sample The central limit ...

Small Sample The central limit  theorem does not work well  with small  samples  even if  the  population  in non Gaussian. So  we cannot  rely on the central limit theorem

Linear programming, A paper mill produces two grades of paper viz., X and Y...

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 Y paper i

Service distribution of the machines in a bank, ABC Bank faces a decision t...

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

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd