Article on Sampling Techniques
Sampling is an essential part of survey researches used to gather data from a population in order to better understand how an entire group functions. Sampling involves selecting a portion of the population to answer survey questions rather than collecting data about all members of the group. Sampling techniques are used in order to make data collection more efficient and accurate.
Random sampling is a type of probability sampling that uses random selection methods to select respondents for a survey. This method is considered to be the most accurate and unbiased way of conducting a survey. Random sampling ensures that every member of the population has an equal chance of being selected as a respondent, thus promoting greater uniformity in the data.
Stratified sampling is another type of probability sampling that divides a population into specific and homogeneous subgroups and randomly selects respondents from each subgroup. The purpose of this method is to provide representation from different segments of the population, enabling researchers to generalize the results more accurately.
Systematic sampling is a type of probability sampling that selects respondents from the entire population at spaced intervals. This method is typically used when respondents are listed in some sort of order and the researcher wants to select every tenth, twentieth, or hundredth respondent for the survey.
Non-probability sampling is a technique that does not depend on random selection. Instead, this method is based on the researchers own judgment and preference. In this type of sampling, the researcher selects participants based on their own criteria. Although this method may lack the accuracy and credibility of random sampling, it can provide useful insights in certain situations.
Quota sampling is one of the most commonly used non-probability sampling techniques. It involves dividing the population into separate subgroups or quotas and selecting respondents accordingly. This technique is particularly useful when studying a specific population trait, as it ensures that the survey sample remains similar to the majority of the population.
Snowball sampling, a type of non-probability sampling, is used when it is difficult to locate and identify a target population for the survey. This method involves selecting a few people from a population and having them refer other likely respondents to the researcher. Although this technique is not as accurate as random sampling, it is useful when the researcher is unable to find a complete list of potential respondents.
Whatever sampling technique is used, it is important to remember that the goal of a survey is to obtain accurate and complete results. Careful selection of participants is the key to success in this process. Therefore, it is important to carefully consider the type of sampling technique that is used in order to get the best and most reliable results.