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ELECTIVE, Data Collecting Methods; Sampling Methods
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Terms in this set (33)
Methods of Collecting Data
Direct or Interview Method
Indirect or Questionnaire Method
Registration Method
Observation Method
Experimentation
Direct or Interview Method
Person - to - Person interaction between the an interviewer and an interviewee.
Indirect or Questinnaire Method
Alternative Method for the interview method. Written responses are obtained by distributing questionnaires.
Registration Method
Enforced by private organization or government agencies for recording purposes
Observation Method
A Scientific Method of investigation that makes possible use of all senses to measure or obtained outcomes / responses from the object of study
Experimentation
Used when the object is to determine the cause - and - effect of a certain phenomenon under some controlled conditions.
Population
Finite or Infinite collection of objects, events, or individuals
Line Graphs
Used to track changes over short and long period of time. When smaller changes exist, line graphs are better to use than bar graphs
Circle Graphs or Pie Chart
Used to compare the parts of a whole. It represent data usually in the same proportion as the numerical data in a table
Picture Graph or Pictogram
Showing pictures of symbols related to the subject under study
Map Graph or Cartogram
One of the best ways to present geographical data. This kind of graph is always accompanied by a legend which tell us the meaning of the lines, colors or other symbols used and positioned in map.
Sample
Part of a target population
Yamani's Formula
Used in determining the sample size. Another name: Slovin's Formula
Yamani's Formula
n = N/1+Ne
Where:
N is the Population Size
n is the Sample size
e is the Margin of Error (1% - 10%)
social science - 5%
medicine - 1%
Random Sampling (Probability Sampling)
It is the most commonly used sampling technique which each member in the population is given an equal chance of being selected in the sample.
Non - Random Sampling
It is a method of collecting a small portion of the population by which not all the members in the population are given the chance to be included in the sampling.
Random Sampling Techniques
Lottery or Fishbowl Method
Systematic Sampling
Stratified Random Sampling
Cluster Sampling
Multi - Stage or Multiple Sampling
Scatter Point Diagram
...
Lottery or Fishbowl Method
This is done by simply writing names or numbers of all the members of the population in small rolled pieces of paper which are later placed in a container. The researcher shakes the container throughly then draws n out of N pieces of paper as desired of a sample
Systematic Sampling
It applies to a group of individuals arranged in a waiting line or in a methodical manner.
Statrified Random Sampling
When the population of can be partitioned into several strata or subgroups
Cluster Sampling
Is done when simple random sampling is almost impossible because of the size of the population.
Multi-Stage or Multiple Sampling
This technique uses several stages or phases in getting the sample from the population. It is an extension or a multiple application of the stratified random sampling technique.
Non - Random Sampling Techniques
Judgement or purposive Sampling
Quota Sampling
Convenience Sampling
Judgement or Purposive Sampling
Usually based on a certain criteria laid down by the researcher or his adviser. Researcher believes that some subjects are fit for the researcher compared to other individuals.
Quota Sampling
This is a relatively quick and inexpensive method to operate since the choice of the number of persons or elements to included is done at the researcher's own convenience or preference and is not predetermined.
Convenience Sampling
The samples are selected because they are accessible to the researcher. Subjects are chosen simply because they are easy to recruit.
Forms of Data Presentation
Textual
Tabular
Graphical
Bar Graphs
Line Graphs
Circle Graphs or Pie Chart
Picture Graphs or Pictogram
Map Graph or Cartogram
Scatter Point Diagram
Textual
Combines text and numerical facts in a statistical report
Tabular
Provides numerical facts in a more concise and systematic manner. Statistical tables are constructed to facilitate the analysis of relationships
Graphical
It is the most effective means of organizing and presenting statistical data because the more important relationships are brought out more clearly and creatively in virtually solid and colorful figures.
Bar Graph
Used to compare things between different groups or to track changes over time. However, when trying to measure change over time, bar graphs are best when the changes are larger.
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