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

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