Introduction - Whatisasurvey 1.Introduction Statistics...

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3/1/2013 1 1. Introduction What is a survey? A survey is a systematic method for gathering information from entities for the purposes of constructing quantitative descriptors of the attributives of the larger population of which the entities are members The quantitative descriptors are called Statistics. Statistics are quantitative summaries of observations on a set of elements There are two type of statistics : 1. Descriptive statistics describing the size and distributions of various attributes in a population. Example, the total number of employment size in IT industry; the percentage of Singapore residents visit a dentist at lease once a year; the mean years of education of persons. 2. Analytic statistics, measuring how two or more variables are related. Example, a regression coefficient describing how much increases in income are associated with increases in years of education; a correlation between advertising expenditure and sales. What is survey methodology? It is the study of sources of error in surveys and how to make the numbers produced by surveys as accurate as possible. The error here is used to describe deviations from the true values applicable to the population studied. It seeks to identify principles about the design, collection, processing, and analysis of surveys that are linked to the cost and quality of survey estimates
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3/1/2013 2 Other methods of collecting information Administrative record systems of governments and business.
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