Author Topic: How to Use Stratified Sampling  (Read 260 times)

Offline tanzina_diu

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How to Use Stratified Sampling
« 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.
Tanzina Hossain
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Department of Business Administration
Faculty of Business & Economics

Offline munna99185

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Re: How to Use Stratified Sampling
« Reply #1 on: April 13, 2016, 10:25:23 AM »
Informative post.

Sayed Farrukh Ahmed
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Faculty of Business & Economics
Daffodil International University


Offline Nusrat Nargis

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Re: How to Use Stratified Sampling
« Reply #2 on: April 18, 2016, 04:27:43 PM »
thanks for sharing.
Nusrat Nargis

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Department of Business Administration
Daffodil International University

Offline Shah Alam Kabir Pramanik

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Re: How to Use Stratified Sampling
« Reply #3 on: May 19, 2016, 04:12:09 PM »
Thanks for Sharing

Offline Showrav.Yazdani

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Re: How to Use Stratified Sampling
« Reply #4 on: July 02, 2016, 09:37:33 PM »
Thanks for Sharing.
Regards,
Dewan G. Y. Showrav
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Offline Nurul Mohammad Zayed

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Re: How to Use Stratified Sampling
« Reply #5 on: July 03, 2016, 01:15:33 AM »
Research Friendly Post .........
Nurul Mohammad Zayed
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Offline Rozina Akter

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Re: How to Use Stratified Sampling
« Reply #6 on: July 05, 2016, 10:56:23 AM »
thanks for sharing :)
Lecturer in finance