Daffodil International University

Faculties and Departments => Business & Entrepreneurship => Business Administration => Topic started by: tanzina_diu on March 27, 2016, 05:00:56 PM

Title: How to Use Stratified Sampling
Post by: tanzina_diu on March 27, 2016, 05:00:56 PM

In stratified sampling, the population is partitioned into non-overlapping groups, called strata and a sample is selected by some design within each stratum.

For example, geographical regions can be stratified into similar regions by means of some known variable such as habitat type, elevation or soil type. Another example might be to determine the proportions of defective products being assembled in a factory. In this case sampling may be stratified by production lines, factory, etc.

Can you think of a couple additional examples where stratified sampling would make sense? Look for opportunities when the measurements within the strata are more homogeneous.

The principal reasons for using stratified random sampling rather than simple random sampling include:

1. Stratification may produce a smaller error of estimation than would be produced by a simple random sample of the same size. This        result is particularly true if measurements within strata are very homogeneous.
2. The cost per observation in the survey may be reduced by stratification of the population elements into convenient groupings.
3. Estimates of population parameters may be desired for subgroups of the population. These subgroups should then be identified.

Title: Re: How to Use Stratified Sampling
Post by: munna99185 on April 13, 2016, 10:25:23 AM

Informative post.

Sayed Farrukh Ahmed
Assistant Professor
Faculty of Business & Economics
Daffodil International University

Title: Re: How to Use Stratified Sampling
Post by: Nusrat Nargis on April 18, 2016, 04:27:43 PM

thanks for sharing.

Title: Re: How to Use Stratified Sampling
Post by: Shah Alam Kabir Pramanik on May 19, 2016, 04:12:09 PM

Thanks for Sharing

Title: Re: How to Use Stratified Sampling
Post by: Showrav.Yazdani on July 02, 2016, 09:37:33 PM

Thanks for Sharing.
Regards,
Dewan G. Y. Showrav
Lecturer
Dept. of Business Administration

Title: Re: How to Use Stratified Sampling
Post by: Nurul Mohammad Zayed on July 03, 2016, 01:15:33 AM

Research Friendly Post .........

Title: Re: How to Use Stratified Sampling
Post by: Rozina Akter on July 05, 2016, 10:56:23 AM

thanks for sharing :)