Sequential sampling -sampling decisons, Operation Research

Sequential Samplin

The previous  has shown  that the sampling  units  were drawn  prior  to the drawing of the actual   sample  and has  a fixed  size. But the  sequential  sampling  known  as  sampling analysis differs  from  the previous  samples in the sense that it  does not make  an advance determination  of the sample size. In  this case the  researcher  obtains measurements on  one  unit  or the population at a single time. A group  of population  units is  also measured  at a time. The measurement of each group  are cumulated. With the  probable error and the cumulated results the size of the  sample can  be decided. If  the error is too  large  the study  of additional groups  continues until  the standard  error is reduced  to a minimum level.

The  sample  size may  vary  according  to the need  of the  management and standard error. It is  not fixed in test the  hypotheses sequential  sampling  reduces the required  sample size as compared to the fixed sampling. When the sequential  sampling  is applied  the survey costs  may be reduced. The utility of  sequential sampling in marketing is not very useful because there is need of a randomly selected  sample or  cross section study. No small  group  of sample  will  be sufficient. There may be  need of  additional groups of samples to  reduce standard  error which may  involves  more cost. By the  time the  nest sample  is taken  into study  the report  of the  previous study  may be outdated. Considering the  utility of the  continuing  sampling the sequential  sample  is utilized in  the marketing  study.

 

Posted Date: 2/26/2013 2:43:37 AM | Location : United States







Related Discussions:- Sequential sampling -sampling decisons, Assignment Help, Ask Question on Sequential sampling -sampling decisons, Get Answer, Expert's Help, Sequential sampling -sampling decisons Discussions

Write discussion on Sequential sampling -sampling decisons
Your posts are moderated
Related Questions
we have three reservoirs with daily supplies of15, 20 and 25 litres of fresh water respectively. on each day we must supply four cities A B C D whose demands are 8 10 12 and 15 res

. 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

Research Paper Overview Research Topic: •    Research the effects of federal mandates in your state.  Examples include the Americans with Disabilities Act, the No Child Left B

Solve the following Linear Programming Problem using Simple method. Maximize Z= 3x1 + 2X2 Subject to the constraints: X1+ X2 = 4 X1 - X2 = 2 X1, X2 = 0

WOULD YOU RECOMMEND FOCUS GROUPS OR SOME OTHER RESEARCH DESIGN IN THIS SITUATION

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

Overhead Projector  Overhead  projector  casts an images of the transparencies  on a  screen. Transparencies  are frequently  used  visual  aids  especially  when  audience

Operation Research may be regarded as a tool which is utilized to increase the effectiveness of the management decisions. O R is objective supplement to the subjective feeling

Calculation of Standard Deviation - Continuous Series: In the continuous series the methods of calculation standard deviation is almost the same as in a discrete frequency distrib

can u send me some assigment problems