Chi square test for independence of attribute , Operation Research

Chi Square Test for Independence  of Attribute

The chi square  test  can be  used to find out  whether two  or more attributes are associated or not. This  test helps  in finding the association or  independence of two  or more  attributes. In  order  to test  the independence  of two  attributes  you should take  the null  hypothesis that the two attributes  are  independent. The second  step under  null  hypothesis is to  compute the expected frequencies for  each  cell of  contingency table. In  case of  contingency table  the expected frequency  for ( A1, B1) will be  calculated as:

E ( A1, B1)  = (A1) (B1) / N

After computing expected frequencies you can  calculate the value  of chi square . the   calculated  value  of chi square  will be then compared with  table value at certain level of significance ( usually at 5% for  ( r- 1) ( c-1) degree of freedom. If  the calculated value  is lower than table  value then you will  accept the  null hypothesis  that two  attributes are independent. In case  calculated  value is greater than  the table value  then the  null hypothesis will be  rejected and you will  conclude that two  attributes are associated.

Posted Date: 2/26/2013 11:36:56 PM | Location : United States







Related Discussions:- Chi square test for independence of attribute , Assignment Help, Ask Question on Chi square test for independence of attribute , Get Answer, Expert's Help, Chi square test for independence of attribute Discussions

Write discussion on Chi square test for independence of attribute
Your posts are moderated
Related Questions
#what is the similarity and differences between transportation and linear programing models?

SIMO Chart Flow Diagram The  flow  diagram  is a drawing  indicating  the paths  of men  materials  or components on a scale  plan of  the work  area, department or  factory.

Task1:- A company is currently involved in negotiation with its union on the upcoming wage contract. Positive signs in the table represent wage increase while negative sign represe

a question was given but i cannot identify the alternatives and i do not know how to calculate the right amount of payoff.what are the right ways to calculate the payoff table.

solve the LPP using simple method, maximize z= 3x1+2x2 subject to constraints

Research Abstracts Abstracts of researches completed are available from the followings publications: a. ICSSR Research Abstracts: contain abstracts of research projects

POSSON DISTRIBUTION   In binomial  distribution the value of n was  finite. But  there are few  problems  when  cannot  be estimated. So in these  binomial  distribution

In a business, statistics is used to study the demand and market characteristics of the product or service being sold. In fact, market research

LCD Projectors  LCD projectors  are several  steps  ahead of conventional OHPs. These  projectors  are more  compact  and more  powerful  and can  be directly  linked to a

b. 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 pape