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| a portion of the population |
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| smaller than a mass/population |
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| Cristobal and Cristobal (2017) |
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Definition
sample – a portion of the population
group – smaller than a mass/population
mass – larger than a group. |
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| Sampling Method or Sampling Technique |
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Definition
| the process of studying the population by gathering information and analyzing that data. |
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| Probability & Non-Probability Sampling |
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Definition
An equal chance of participation in the sampling or selection process (simply chance process) is given to every member listed in the sampling frame.
It is basically a principle of randomization or chance. |
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| It is the most popular sampling method used in decision making today |
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| Example: Lottery Method or Fishbowl Method, Table of Random Numbers |
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| A fixed sample interval in choosing a respondent is determined |
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| Example: Checking every 10th student in the list |
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Definition
| the total population is divided into smaller groups to complete the sampling process. |
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| Example: There are three bags (A, B and C), each with different balls. Bag A has 50 balls, bag B has 100 balls, and bag C has 200 balls. We must choose a sample of balls from each bag proportionally. Suppose 5 balls from bag A, 10 balls from bag B and 20 balls from bag C. |
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| population is divided into smaller groups and the group to be used is selected randomly. |
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| Example: An educational institution has ten branches across the country with almost the same number of students. If we want to collect some data regarding facilities and other things, we can’t travel to every unit to collect the required data. Hence, we can use random sampling to select three or four branches as clusters. |
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Definition
It disregards random selection of samples.
The sample is chosen based on their availability, or the purpose of study, and in some cases, on the sole discretion of the researcher. |
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Definition
Also referred to as Availability Sampling
The samples are easy to select, and the researcher did not choose the sample that outlines the entire population. |
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| Purposive or Judgmental Sampling |
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Definition
In purposive sampling, the samples are selected only based on the researcher’s knowledge.
It is also known as judgmental sampling or authoritative sampling. |
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Definition
| a sampling technique whereby participant quotas are preset prior to sampling. |
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| also known as chain referral sampling. In this method, the participants refer the researcher to others who may be able to potentially contribute or participate in the study. |
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| Consecutive sampling is like convenience sampling with a slight variation. The researcher picks a single person or a group of people for sampling. Then the researcher researches for a period to analyze the result and move to another group if needed. |
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