Mandeep Singh
www.vbams.com
www.mandeepvba.blogspot.com
Well its time to discuss something about Sampling. But before I think you need to know about “Population”. In statistics “Population” is every thing that we wish to study. For example if some manufacturing company wants to find out defects in the boxes (made by their company) for them population is all existing boxes in the warehouse. Boxes may be 100, 1000, 10000 or more depending upon the size of the company. Due to some reasons (discussed below) it is not possible to check all the boxes, so best way to estimate the defects is get sample form the total number of boxes, examine them and based on finding conclude something about whole population. So before doing any sort of analysis sampling is important task need to be done.
We can not examine whole population because of following reasons:
- Well in above example suppose if we have currently 10000 boxes, and each box required approximately 1 minute to examine, that means we need total 10000 minutes to examine all the boxes.
- Some time it may be possible that once we examine some boxes they can not be used again. For example a ice cream company is interested to find out sugar level in each box. Well practically it is not possible to check sugar level in each box, because once we open it we can not use it again. That means we can not ignore the cost factor in such case. So in case of ice cream if we check each box, that means we have nothing to sell.
There are many other such reasons because of that it is impossible to examine the entire population. So, better way is to choose some sample from the population.
How to select Sample:
Now next question is how to select sample?
Well there are numbers of sampling methods available that can be helpful in different situations. These are:
Random Sampling
Systematic Sampling
Stratified Sampling
Convenience Sampling
Judgment Sampling
Quota Sampling
Snowball Sampling
Cluster (Area) Random Sampling
Multi Stage Sampling
To know more about these sampling methods click here
- Related Videos
- Related Articles
- Ask / Related Q&A
- How To Outsource Market Research In The Uk?
- Niche Market Research - 7 Easy Steps
- Things You Should Keep in Mind For Market Research
- Online Dating Survey and Market Research
- Demographics: A Key to Effective Market Research
- Market Research Firms
- Consumer Market Research and B2B Market Research - - What's the difference?
- Bharatbook.com : Retail market research and sector trend analysis for India
Make Money By Doing Home Parties And Selling Gift Items From Catalogs!
By: Father Time | 29/12/2009This is a fun and easy way to earn a living! You can even earn a lot of money this way!
Publishing Content - A Flexible Online Marketing Strategy
By: TJ Philpott | 29/12/2009Although publishing content does involve time and effort it is a very effective and flexible online marketing strategy. If your content contains useful information, and it should, you can easily find multiple uses for the same body of work. Read on to see 7 different ways in which you can use the same piece of content for promoting yourself or your business online.
Shaping Your Sign
By: Aron Chorley | 28/12/2009Even though the basic sign options are rectangular in shape, this doesn’t mean that you cannot design your sign using different shapes inside this space. The proper use of shapes in your design can make your sign more attractive and help it attract more attention.
Various Uses of Safety Signs
By: Aron Chorley | 28/12/2009There are so many different uses for safety signs and decals. SpeedySigns.com is a great online resource for all of your custom signage needs, and safety signs and decals are no exception. By visiting the OSHA sign section of our site, you will have access to a wide variety of ready-made safety signs and the ability to customize safety or warning signs of your own.
Article Marketing Strategies: Reveal Top 3 Article Promotion Tips To Make $150 A Day
By: Article Marketer | 28/12/2009Do you want to make $150 a day from free traffic? Then read this article to reveal top 3 article marketing strategies many gurus use on a daily basis.
Article Profits: The 3 Important Keys to Successful Article Marketing
By: Article Marketer | 28/12/2009Big article profits can be achieved only if you know and follow the following 3 article marketing tips.
Article Marketing Secrets Exposed: Why Is It So Important To Write Clear And Concise Content?
By: Article Marketer | 28/12/2009Article marketing secrets are exposed all around on the web. But do you know what the main secret of article marketing success is? From my own experience I can surely say that it is professional content. So read on to find out the answer to the following questions: 1) Why Is It So Important to Write Clear and Concise Content? And 2) How Can I Create Professional Articles?
Article marketing can be a big challenge if you don’t have all the necessary tools that help to produce high quality content with less effort and in m
By: Article Marketer | 27/12/2009Article marketing can be a big challenge if you don’t have all the necessary tools that help to produce high quality content with less effort and in minimum time. So read on to find out the best online tool that will help you save time while writing articles.
Need of Sampling and Sampling Methods
By: Mandeep Singh | 24/09/2008 | Marketing TipsIn the area of Marketing Research Sampling is very important topic. If our initial steps are not correct we can never get those results that we expect from any marketing campaign. So in this article we will discuss about need of sampling and sampling methods.
How to Handle Missing Values
By: Mandeep Singh | 27/08/2008 | Information TechnologyTo analyse the situation first thing you need is historical data (relevant to the problem). Once you have data, its need to be in proper format so it can be easily analyse. There may be number of problems you have to face while bringing the data into proper format. One problem is how to handle missing or inconsistent data. In this article we go through few basic techniques that used to solve this problem.
Traditional Face to Face Learning and Global/online Learning & Supporting Tools
By: Mandeep Singh | 22/08/2008 | Online EducationGlobal learning offers many advantage to students but it can not eliminate the traditional way of teaching where face of face workshops are very important in some fields. In this article we will deeply discuss about traditional face to face learning, global/online learning and some tools that support the global learning. Valuable references are given in the end of this article, which can be helpful in your research.