Sampling Procedure and the Sample Flashcards
The first step in determining the sample size is identifying the __________ of the topic of interest. is the totality of all the objects, elements,
persons, and characteristics under consideration.
It is understood that this population possesses common characteristics about which the research aims to explore
Population and Sample
Two types of population
Target Population
Accessible Population
The actual population is the
Target Population
is the portion of the population in which the researcher has reasonable access
Accessible Population
pertains to the systematic process of selecting the group to be analyzed in the research study.
Sampling
This approach refers to the general rule or rule of the thumb for sample size.
Heuristics
(Research Design)
Descriptive Research
(Suggested Number of Subjects/Participants)
10% to 20% maybe required
(Research Design)
Comparative Research
(Suggested Number of Subjects/Participants)
15 subjects or groups
(Research Design)
Survey
(Suggested Number of Subjects/Participants)
800
(Research Design)
Correlational
(Suggested Number of Subjects/Participants)
100 to 200
(Research Design)
Ex post facto
(Suggested Number of Subjects/Participants)
30+
(Research Design)
Experimental
(Suggested Number of Subjects/Participants)
30 or more
Another approach is by reading similar or related literature and studies to your current research study.
Literature Review
There are two principles you need to consider if you are going to use this approach: these are statistical power and effect size.
Power Analysis
The probability of rejecting the null hypothesis is called
Statistical Power
The level of difference between the experimental group and the control group refers to
Effect Size
It is a way of choosing individuals in which all members of the accessible population are given an equal chance to be selected.
There are various ways of obtaining samples through ______ ______ ________
These are fishbowl technique, roulette wheel, or use of the table of random numbers.
Simple Random Sampling
The same with simple random sampling, ________ ______ ___________ also gives an equal chance to all members of the population to be chosen.
However, the population is first divided into strata or groups before selecting the samples
The samples are chosen from these subgroups and not directly from the entire population.
This procedure is best used when the variables of the study are also grouped into classes such as gender and grade level.
Stratified Random Sampling
This procedure is usually applied in large-scale studies, geographical spread out of the population is a challenge, and gathering information will be very time-consuming. Similar to stratified random sampling, _______ ________ also involves grouping of the population according to subgroups or clusters.
It is a method where multiple clusters of people from the chosen population will be created by the researcher in order to have homogenous characteristics.
Cluster Sampling
This procedure is as simple as selecting samples every nth (example every 2nd, 5th) of the chosen population until arriving at a desired total number of sample size.
Therefore, the selection is based on a predetermined interval.
Dividing the population size by the sample size, the interval will be obtained.
For example, from a total population of 75, you have 25 samples; using systematic sampling, you will decide to select every 3rd person on the list of individuals.
Systematic Sampling
