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Non Probablity Sampling Methods

16.07 Diposting oleh riezea

Actually there are two sampling methods, namely probability sampling and non-probability sampling. However, we will study the second. 

Non-Probability Sampling Method is a method of selecting a sample of the population does not use the rule-rule probability (opportunities). Non-Probability Sampling methods used when Probability Sampling methods can not be used, particularly in relation to the reduction of cost, time, energy and the problems that arise in the framework of making the sample. 

Including the probabilita Sampling method is as follows: 
1. Convinience Sampling 
2. Judgment Sampling 
3. Quota Sampling 
4. Snowball Sampling 

Let's take a look one by one
1. Convenience  sampling

Basic Concept The sample was taken based on the availability of the elements and the ease to get The sample was chosen because at the time and the right place This is usually used in the initial phase of research 
Advantages: a. Cheaper and faster (cost effective and time) b. Suitable for pilot study Disadvantages: a. The result is not reliable b. Can not be used when the population can not be defined 
Sample Applications : Research on consumer perceptions of the service. Research carried out for a sunday. Samples are taken of 100 people. Consumers will be selected as the sample is the first of 100 people found in the store during the period of research. 

2. Judgment sampling 

Basic Concept Judgment sampling is a sampling based on criteria that have been determined Sampling criteria, namely, two, Expert sampling The selection of representative sample based on the opinions of experts who so and the number of samples taken depends on the opinions of experts concerned. 

Purposively sampling Sample selection based on personal research on the researchers who claim that the sample selected truly representative. Researchers must have adequate knowledge. 
Advantages: a.When probability sampling can not be used at all 
b.when sample is very small (<20) 

I hope you can understand it and get useful information. There may be words that are strange and the new note by you, tomorrow there is more about statistics and its continue .  Statistic for our life, trust it Do not forget to leave your comment, url or e-mail

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