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33861 - Introduction to Biostatistics Dr Moataza Mahmoud...

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نمحرلا هللا مسب نمحرلا هللا مسب ميحرلا ميحرلا
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Introduction to Introduction to Biostatistics Biostatistics Dr. Moataza Mahmoud Abdel Wahab Lecturer of Biostatistics High Institute of Public Health University of Alexandria
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Biostatistics Biostatistics (a portmanteau word made from biology and statistics) The application of statistics to a wide range of topics in biology .
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Biostatistics Biostatistics It is the science which deals with development and application of the most appropriate methods for the: Collection of data. Presentation of the collected data. Analysis and interpretation of the results. Making decisions on the basis of such analysis
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Other definitions for “Statistics” Frequently used in referral to recorded data Denotes characteristics calculated for a set of data : sample mean
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Role of statisticians To guide the design of an experiment or survey prior to data collection To analyze data using proper statistical procedures and techniques To present and interpret the results to researchers and other decision makers
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Sources of data Records Surveys Experiments Comprehensive Sample
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Types of data Types of data Constant Variables
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Quantitative continuous Types of variables Quantitative variables Qualitative variables Quantitative descrete Qualitative nominal Qualitative ordinal
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