SAMPLING

 

 

 

 

Types of sampling

 

 

Saritha TS

 

 

 Notes prepared for the ICT work shop as a part of M.Ed. curriculum

 

 

 

 

NSS training college Ottapalam

Research centre in education

Affliated with   NAAC. Grade A

2023 

 

 

Sl no	Content	Page
1	Cluster sampling	3
2	Selection of the cluster	3
3	characteristics	3
4	Example of cluster	4

                                      5         incidental sampling                            4

 

 

 

 

 

 

 

 

 

 

                         Cluster sampling

Cluster sampling is used when the population under study  is infinite, where a list of units of population does not exist, when the geographic distribution of units if scattered or when sampling of individual units if not convenient for several administrative reasons. It involves division of the population into clusters of the clusters that serve as primary sampling units.

Selection of the clusters

A selection of the clusters is then made to form the sample.Thus in cluster sampling, the sampling unit is contain clusters instead of individual members or items in the population. For example for he purpose of selecting a a sample of high school teachers in the state, you ay enlist all high schools instead of teachers teaching in high schools and select randomly a 10 per cent sample of the schools as cluster you may then use all the teachers of the selected schools as the sample or randomly select t a few of them.

characteristics

Any location within which we find an intact group of similar characteristics is termed as cluster.

Example of cluster.

Example of cluster include classroom. Schools, hospitals and study venters. Cluster sampling is economic, especially when the cost of measuring a unit is relatively small and cost of reaching it is relatively large.

INCIDENTAL SAMPLING

 

The term incidental sample ,also  known as accidental sample or convenience sample, is applied to samples that have been drawn because of the easy availability of units. An investigator employed in the IGNOU my  select learners enrolled in MDE programmed  and who happen to visit the university for one or the other work while conducting a study on the perception of distance leaners towards MDE. These learners are readily available and fulfil the conditions of the study. However It is the limitation that though they have defined population but no randomization has actually been done. Therefore any attempt to arrive at generalized conclusion in such cases will be erroneous and misleading. The merits of this procedure are mainly the convenience of obtaining units , the ease of testing and completeness of the data collected

characteristics

incidental sampling is a non-probability sampling method where units are selected for inclusion in the sample because they are the easiest for the researcher to access. This can be due to geographical proximity, availability at a given time, or willingness to participate in the research.