definition of population and sample in research methodology pdf

Definition Of Population And Sample In Research Methodology Pdf

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Study population is a subset of the target population from which the sample is actually selected. High school students all over the world might be considered as the target population.

Study Population

Home Consumer Insights Market Research. Definition: A sample is defined as a smaller set of data that a researcher chooses or selects from a larger population by using a pre-defined selection method. These elements are known as sample points, sampling units, or observations. Creating a sample is an efficient method of conducting research. In most cases, it is impossible or costly and time-consuming to research the whole population. Hence, examining the sample provides insights that the researcher can apply to the entire population. For example, if a cell-phone manufacturer wants to conduct a feature research study among students in US Universities.

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Statistics without tears: Populations and samples

All research questions address issues that are of great relevance to important groups of individuals known as a research population. A research population is generally a large collection of individuals or objects that is the main focus of a scientific query. It is for the benefit of the population that researches are done. However, due to the large sizes of populations, researchers often cannot test every individual in the population because it is too expensive and time-consuming. This is the reason why researchers rely on sampling techniques.

Introduction Research can simply be described as a diligent and scientific enquiry or investigation into a subject or problem in order to come up with the latest discovery ies so as to resolve an identified societal problem. In any field of knowledge, research is very important as it enables the researcher to discover new ground to cover in meeting human needs and thereby makes society worth living. In making scientific enquiry and come up with a fact in which to base any meaningful research, it is pertinent to note that a researcher has to consult some educational resources and contact some group of people in order to ascertain the validity of his or research work. That group of individuals or respondents or elements or observable materials that a researcher has to contact is known as population of the study. Population in this sense, according to Adeniyi et al represents all conceivable elements, subjects or observations relating to a particular area of interest to the researcher.

Sample: Definition, Methodologies, Types, formula, and Examples

Research studies are usually carried out on sample of subjects rather than whole populations. The most challenging aspect of fieldwork is drawing a random sample from the target population to which the results of the study would be generalized. In actual practice, the task is so difficult that some sampling bias occurs in almost all studies to a lesser or greater degree. In order to assess the degree of this bias, the informed reader of medical literature should have some understanding of the population from which the sample was drawn.

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Sampling Methods

Relationship of Sample and Population in Research

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