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Fall 2018

Graded Discussion Board

Research Methods (STA630)

Due date: 6th February, 2019                            Topic: Sampling techniques

Objective of the activity

To familiarize the students with selection of sampling technique in their research.  

Learning outcome

After attempting this GDB, students will be able to analyze different aspects in selection of sampling technique. .


The college administration wants to do research to measure English reading skills of intermediate students of second year. College has currently 3000 registered students in second year, 50% of which are boys and 50% are girls. There are 4 groups; pre-engineering, pre-medical, general science and commerce and each group has 5 sections and each section has 150 students. In order to draw inferences, test of reading skills will be conducted on 500 students.  The maximum budget to conduct this study is Rs.3000. Administration claims that only expense which will be incurred is the cost to administer the test. The administration wants to conduct the study with precision but with constraint of low budget.


What is the best suited sampling technique for this study? Justify your stance with three sound arguments.


Note: For acquiring the relevant knowledge, do not rely only on handouts but watch the course video lectures and read additional material available online or in any other mode.


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Views: 1381

Replies to This Discussion

Please share idea
Please share idea

any one understand what is this ?

I think this is cluster sampling

Please post here idea solution

Convenience sampling is used because it is quick, inexpensive and convenient.

Convenience samples are useful for certain purposes and they require very little planning. Researchers simply use participants in this case groups are already made and will only pick up a sample and check their reading ability and note the result. The procedure is casual and easy relative to random sampling. Contrast using any available participants with random sampling where you must

  1. Have a well-defined population
  2. Construct a list of members of the population if one is not available
  • Sample randomly from the list
  1. Contact and use as many individuals from the list as possible.


Convenience sampling requires far less effort. However, such convenience comes with potential problems which we will describe. Convenience samples are nonprobability samples. Therefore, it is not possible to specify the probability of any population element’s being selected for the sample. Indeed, it is not  possible to specify the population from which the sample was drawn.

I Think

Quota sampling is used because the speed of data collection, lower costs and convenience are the main advantages.  Quota sampling can be considered as a form of proportional stratified sampling, in which a predetermined sample of people is sampled from different groups, but for convenience. The procedure is casual and easy in relation to random sampling. Contrast using any available participant with random sampling where you must have a well-defined population

Yes Quota Sampling is the exact answer.

its solution or its just idea ?

i think its Quota Sampling because different kinds of catagrioes are mentioned in it according to the case. 

Please Discuss here about this GDB.Thanks

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purposive sampling will be used....


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