Chapter 1. Introduction to Data Management

Chapter 1. Introduction to Data Management - 1 Introduction...

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Unformatted text preview: 1 Introduction to Data Management 2 ยก Statistics and Data ยก Data management and Data management system ยก Data collection ยก Coding of data 3 Statistics and Data ยก Example of statistics ยข The total number of postgraduate students decreases from 1654 in 2004/5 to 1406 in 2005/6 ยข The proportions of the postgraduate students who are from the Faculty of Science is 35.5% ยข Based on a sample survey of 100 postgraduate students, the proportions of the students who are from the Faculty of Science is 36% 4 ยก Statistics is based on numbers (data) ยก Definition of Statistics ยข The science of collecting, organizing, presenting, analyzing, and interpreting data to assist in making more effective decision 5 Statistics data ยก Data can be defined based on Variable ยข Variable is a characteristics that varies from one person or object to another ยข Data is the definition obtained by observing values of a variable ยก Variables for student ยข Age ยข Marks in STAT1303 ยข Gender ยก Data for a student ยข For student A โ€“ 20 yr, 67.5, Male 6 Data management ยก Large scale data collection and analysis is common today ยข Research field ยก Biomedical and social science research ยข Government ยก Census, general household survey ยข Commercial field ยก Marketing research, data mining 7 ยก Data management is the systematic handling of information, ultimately stored in electronic form, to preserve the value of the contents for future investigation ยก Data management is a collection of tasks and process to achieve the goal of storing information in electronic form and preserving the value of the contents for future investigation 8 Data management tasks ยก Data management task/process is a set of activities or procedures directly related to accomplishing a specific data management objective. ยข Data collection ยข Coding of data ยข Data entry ยข Date editing and cleaning ยข Data backup and security ยข Documentation ยข Data summarization and presentation ยข Data manipulation and preparation in relate to developing statistical analysis plan for the data 9 Data management system ยก Systematic set of data management activities and procedures related to acquiring, manipulating, documenting, and storing data in a computer environment ยก Integration of data management tasks and data management monitoring within certain resource constraints ยก Designing a data management plan, setting up data management tasks, establishing effective monitoring, maintaining a working system and correcting unexpected problems. 10 ยก Data management monitoring ยข A set of activities or procedures for tracking and evaluating an ongoing data management task ยก Resource profile of a project ยข The available resources and environmental restrictions ยก Data management plan ยข Overview of all data management activities ยข A complete understanding of the resources profile...
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This note was uploaded on 02/09/2012 for the course STAT 1301 taught by Professor Smslee during the Spring '08 term at HKU.

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Chapter 1. Introduction to Data Management - 1 Introduction...

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