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Sampling Frame - Learn About Its Importance In Survey Sampling
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Context holds a lot of importance in statistics. Gaining knowledge about the source of data gives you clarity of what a business can do with it and what conclusions it can make using it. A sample context is important in surveys as it gives information about the source of sample selection that helps create adequate estimates and yield correct inferences.

Let’s learn more about the components of sampling.

OvationMR educates management consultants and market research professionals on why the target population is important for sampling. It helps select the best sampling technique to create a sample frame that will generate the sample size with the least ambiguity, non-response bias, and sampling error.

What is a Sampling Unit?

The sampling unit is the actual unit that a business includes in its sample. Generally, this unit mentions a person. Nevertheless, it can also be a school, a company, or a neighbourhood.

A sampling unit depends on what a business is computing and how it is going to compute it. After putting sampling units into respective contexts, you get the sample frame. This frame comprises a detailed listing of all probable sampling units.

What Is The Target Population?

The term “target population” denotes the overall context. It also shows the group of housing units, people, schools, etc. about which estimates and inferences are desired. In an ideal scenario, the target population perfectly overlaps with the sampling frame.

However, this ideal scenario isn’t possible in a real-life situation. In some cases, the frame can be smaller or larger depending on the method of getting in touch with every member who is included in the sample.

Defining the target population is the essential step before the commencement of research. The target population is characterized as the group or entire population that a market researcher wants to analyse. Once the target population is determined, a sampling frame is drawn.

What are Stratification and its importance?

Stratification in sample design is seen to offer the following benefits to a business:

  • It enhances the sample design efficiency and makes the survey estimates credible
  • It allows a business to apply varying sample designs to specific groups of schools, or other regions;
  • Stratification also ensures that all portions of a population are included in the sample and
  • It makes sure suitable illustrations of precise groups of the target population involved in the sample design.

What Are The Ways In Which Stratification Is Used?

Stratification is utilized in sample design in two types:

  • Explicit
  • Implicit

Explicit stratification: This form of stratification comprises grouping participating entities into strata that are treated independently from each other. In other words, each entity is treated as separate sampling frames.

Implicit stratification: In this form of stratification, the participating entities are sorted distinctively within each explicit level by a group of selected implicit stratification variables.

This method ensures a proportional sample distribution of entities across varying groups used for implicit stratification. This leads to enhanced credibility and dependability of survey estimates.


Understanding the design of sampling is the most important step in handling survey data. Properly defining the sample helps in getting the proper context to calculate estimates and draw inferences.

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