Sample Study in Research

What is Sample Study in Research? Purpose and Techniques

May 13, 2022
Dissertations Research Papers
Albert Barkley

Sample study in research pertains to the study of a particular group in a population because it is impossible to study the entire population. Sample study in research is a common technique to collect reliable data from a group of people because it is difficult to collect data from every person. Researchers use sampling methods to collect reliable data. This article will guide you about sample study in research and its purpose and techniques.

What Is A Sample Study In Research?

Sampling is a method of choosing individuals or a fraction of the population to make inferences from data and assess population characteristics. In a research project, sampling is the selection of a subset of the population of interest. Data is collected from a smaller subset because it is impossible to recruit a whole target population in many research projects. When compared to trying to reach every person in the population, sampling from the population is typically more realistic. It allows data to be obtained faster and at a lesser cost.

Sampling strategies are common in market research. It ensures that the researchers do not have to investigate the entire community to get meaningful insights. A sample study in research is a cost-effective approach. It saves the time and resources of the researchers.

What Is The Purpose Of A Sample Study?

Researchers know there are limited resources in terms of time and money during research. As a result, most researchers use sample study in research to collect data from a fraction of the population instead of the whole population. Sample study in research serves the following purposes:

Less Time Consuming

It takes time to reach out to everyone in a population. And, undoubtedly, some people will not react to the first attempt to reach them, necessitating additional follow-up time on the part of researchers. Random sampling takes substantially less time than surveying the entire population. In contrast, non-random sampling is nearly always quicker than random sampling. As a result, sampling saves time for researchers.


The cost of a study is directly proportional to the number of persons a researcher contacts. Sampling helps researchers save money by allowing them to get the same results from a sample as they would from the entire population.

Because it minimizes the cost of identifying people and gathering data from them, non-random sampling is much less expensive than random sampling. Saving money is vital since every researcher has a limited budget.

Reliable Data

The purpose of research is often to gather a small amount of data from many people, such as in an opinion poll. In some cases, the purpose is to gather a large amount of data from a small group of people, such as user research or ethnographic research. In any case, sampling enables researchers to collect credible data and collect it from a sample representative rather than contacting the entire population.

What Are The Techniques Of Sample Study?

There are different research techniques utilized by researchers for sample study in research. Following are some of the common techniques in the sample study:

Probability Sampling

Probability sampling is a sampling approach in which a researcher picks a sample of participants at random based on criteria. All individuals have an equal shot of being included in the sample with this selection criteria. There are four sub-categories of probability sampling:

Simple Random Sampling

When using basic random sampling, all items have an equal chance of being chosen. This sampling strategy provides all elements with the same probability. It is advantageous when researchers look for relationships extending to the entire population. It is one of the best probability sampling methods that save time and resources for the researchers. It’s a reliable method of data collection. Every member of a population is chosen at random and exclusively by chance. Everyone has the same probability of being chosen to participate in a study.

Cluster Sampling

Cluster sampling pertains to probability sampling. When cluster sampling is employed, every individual in the population has the same and predictable probability of being chosen for the sample group. For this sampling strategy, researchers split the population into clusters, which are intrinsically diverse and outwardly homogenous distinct groups. The clusters appear to be homogenous on the outside because they are linked by a common feature or criterion. But they are heterogeneous on the inside because the subpopulations inside the clusters have various compositions. Researchers divide the clusters into categories by country, city, state, and organization.

Systematic Sampling

Systematic sample study in research pertains to the random probability sampling approach. It is one of the most common sampling techniques used by researchers. This approach entails taking samples from a wider amount of people. While the beginning point may be randomized, each member is sampled at defined intervals. Researchers use the systematic sampling method to select the representative samples from a population at regular intervals. Since the researcher predetermines the sample range, this sampling technique takes less time.

Systematic sampling is straightforward to carry out and comprehend. In terms of producing, evaluating, and analyzing their samples, statisticians who may be limited by budget or time find systematic sampling beneficial. Furthermore, when opposed to other sampling approaches, systematic sampling provides a higher level of control due to its methodology. Systematic sampling also bears a low-risk factor since the data is unlikely to be compromised.

Stratified Random Sampling

When there are variations in a variable across distinct groups, stratified sampling allows for incorporating demographic groups of relevance. The population is split into groups or strata depending on a stratification variable. After that, researchers collect a simple random sample from each stratum. Researchers utilize sampling fractions to calculate the number of people picked from each stratum based on population figures. Stratified sampling is beneficial when there is little variety within strata and a lot of variables across strata. But it is also tricky and easily misunderstood. When members of a population do not fit into only one identifiable subgroup, problems might occur. It results in a sample that does not adequately reflect the population.

Non-Probability Sampling

The researcher picks individuals for a research study at random in non-probability sampling. This sampling technique is not a predefined or set procedure. The problem with this approach is that it makes it challenging to ensure that all members of a population have an equal chance of being incorporated into the sample. Some participants have no possibility of being chosen, while others have an unknown likelihood of being chosen. Although restricted in generalizability, this style of sampling is nonetheless effective for gathering data. It is beneficial, especially for exploratory research and qualitative research. Non-probability sample study in research has the following sub-categories:

Convenience Sampling

Convenience sampling, as the name implies, is an easy method to gain access to the people whom the researcher wants to study. In convenience sampling, researchers can approach the sample population easily. The researcher can easily contact and reach out to the people by using convenience sampling. Researchers have almost no power over the sample items they choose. They do so only based on proximity rather than representativeness. This non-probability sampling approach is beneficial when gathering feedback because of time and expense constraints. Convenience sampling is common in instances when there are limited resources, such as in the early phases of research.

Purposive Sampling

Purposive sampling is often characterized as subjective or judgmental sampling. It is a type of non-probability sampling method. It is a technique in which researchers choose people from the public to participate in their surveys based on their own opinion. When researchers want to pinpoint specific individuals with study-relevant qualities, they utilize purposeful sampling. While the sample is unlikely to be representative of the entire population, people that participate in the research can contribute a wealth of information about the subject of the research question.

Snowball Sampling

Snowball sampling, also known as chain-referral sampling, is a non-probability sampling approach in which the samples have hard-to-find characteristics. This is a sampling method in which current subjects suggest others to acquire samples for a research project. A primary data source nominates other possible data sources who will be allowed to take part in the research investigations using this sampling strategy. The snowball sampling approach is solely referral-based. It is via recommendations that a researcher can acquire a sample.

Quota Sampling

Quota sampling is a sampling approach in which researchers choose the members based on a predefined criterion. Researchers identify the specific attributes of a population and choose the sample based on those attributes. This technique enables the researcher to select a sample that has the same qualities as the entire population. It is a quick way to gather samples. Quota sampling is a simple and affordable way to collect samples. But there comes a problem of selection bias while utilizing this technique. Researchers might choose to include those people who are accessible, and they might not represent the same qualities as the entire population.


Sample study in research is a common technique, and it saves time and energy for the researchers. It helps to collect reliable data and increases the credibility of the study. You can utilize the guidelines mentioned above according to your study design and research questions. However, you have the option to hire the best academic writers if you are facing any issues.