분야
ppt-Definition Of Sampling
-Definition Of Sampling Terminologies
2.THE FEATURES OF SAMPLING TYPES
-Introduction
-Four types Of Probability Sampling Design
The researcher must guarantee that every individual has an equal opportunity for selection and this can be achieved if the researcher utilizes randomization.
way
To select
some units which can represent whole, from a total set of units
The Types Of
Probability Samplings
Simple Random Sampling
Systematic Random Sampling
Stratified Random Sampling
Cluster And Multi-Stage Sampling
The Gallup PollExample
↓
Population
The total set from which the sample is drawn
↑↓
Sample
A subset of units selected from a larger set of the same units
↕
A set of specification of
Target population
↓
All adults living in
Jangchung -Dong on May 1
(Selecting units from population)
Not part of population
Part of population
Abstract
↓
Sampled Unit
↓
Interpretation
The results of a
study will depend on how the population
is defined.
Sampling frame
a specific set of units from which the sample is actually drawn.
The telephone directory listing of individual, a company’s internal data
-base listing its employ-
ees or customers, univ
ersity registration lists.
Parameter
A characteristic of the population
Unit or set of units considered for selection at a stage of sampling
Unit of analysis
Type of object whose characteristics interest us and whose characteristics we want to measure and study
Terms of Sampling
Sampling frame
Unit of analysis
Parameter
Sampling unit
Sample bias
Sample fraction
High school students
as Freshmen
(Unit of analysis)
High school
(Sampling unit)
