Determining sample size for estimating poportions, Operation Research

Determining Sample Size for Estimating poportions

It is  necessary  to determining  the sample size for a  problem involving  proportions. This deals  with the percentage of frequency  of occurrence. The standard  deviation is  computed considering  the  proportions of  the happening  of the  particular  event. If the  frequency of occurrence is  known  as p and the frequency  of non occurrence is known  as 1 , the  standard deviation  of the  proportion maybe

                   p = √p q/n

The samples  size is determine  as discussed  earlier. The precision and population size have been  the deciding  factors for  determining  the sample size. The precision can again  be expressed absolutely or  relatively. Absolute  precision involves  that the  estimate will be within  plus  or minus  of the true value i ,e,± 5 percentage  points  of the true  value. If  the sample  elements  are selected independently  and if  the sample  size is small the correct  distribution  of the sample proportion will  be binomial. It is  convenient  to employ the normal  approximation for  estimating the  sample size. After the sample  is  drawn and the  sample  promotion  determined  the researcher  determines  the confidence  interval.

 

 

Posted Date: 2/26/2013 3:10:41 AM | Location : United States







Related Discussions:- Determining sample size for estimating poportions, Assignment Help, Ask Question on Determining sample size for estimating poportions, Get Answer, Expert's Help, Determining sample size for estimating poportions Discussions

Write discussion on Determining sample size for estimating poportions
Your posts are moderated
Related Questions
Requirements and Characteristics of a good table In the words  of Mr. Harry Jerome a good statistical table  is a triumph of ingenuity and  technique masterpiece of economy  o

Demerits a.It cannot  be used in  the case  of  bi variate distribution. b.If the  numbers  of items  are greater than say  30, the calculation becomes  tedious  and  requ

Manner of Presentation  Decide  whether  you wish  to achieve  your  objective by a formal  presentation or a  non formal  type  of presentation. As  discussed  earlier the


Techniques of Observation Method Observation always involves some interaction between respondent and researcher in which researcher has an opportunity to watch respondent fu


This assignment requires you to evaluate a product from the view point of quality, both quality of design (as perceived by the user) and quality of conformance. To ensure that we a

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


Stratified Sample Size The  sampling  study  has depended  much on the stratified sample  to reduce  the sampling  error, samples  size may have a number of strata or  cluster