Lecture 1 - What is Statistics? Statistics is the science...

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What is Statistics? Statistics is the science of collecting, describing, and interpreting data. Two Areas of Statistics Descriptive Statistics: utilizes numerical and graphical methods to look for patterns, to summarize, and to present the information in sample data Ex: Inferential Statistics: utilizes sample data to make estimates, decisions, predictions, or other generalizations about a population. Ex:
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INTRODUCTION TO BASIC TERMS Population: A collection, or set, of individuals or objects or events whose properties are to be analyzed. Ex: Sample : A subset of the population Ex: Variable : A characteristic about each individual element of a population or sample Ex:     Data  (singular):   The value of the variable  associated with one unit of a population or sample.  The value may be a number (ex. temperature), word  (ex. rain), or a symbol.
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Data  (plural):   The set of values collected for the  variable from each of the elements belonging to the 
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This note was uploaded on 02/15/2009 for the course STAT 2004 taught by Professor Melutz during the Fall '07 term at Virginia Tech.

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Lecture 1 - What is Statistics? Statistics is the science...

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