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
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

#questioA 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

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 assignm

Step 1: Research Towers of Hanoi problem The Towers of Hanoi is a problem frequently used to teach recursive programming techniques. Step 2: Run the assembly code from Hanoim

Application of the chi Square Test   The  chi square distribution  has a number of applications are given  below: a.Chi Square test of goodness of fit. b.Chi square te

Steps of Research Proposal Proposal Content  The researcher is always given instructions for preparing a proposal that indicate the format to be followed. Funding agencie

Area under Standard Normal Curve The graph  of the  standard  normal  curve y = p(z) with  different percentages areas is  shown here. Since p(z) is  a probability  distributi

Ask question #Minimum 100 words what can engineer planner do in métallurgie accepted#


The Best Corporation is considering making either minor or major repairs to a malfunctioning production process.  When the process is malfunctioning, the percentage of defective it