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The Complete Idiot's Guide to Statistics, 2nd Edition by Robert Donnelly

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Chapter 2
Data, Data Everywhere and Not a Drop to Drink
In This Chapter
◆ The difference between data and information
◆ Where does data come from?
◆ What kinds of data can we use?
◆ Different ways of measuring data
◆ Setting up Excel for statistical analysis
Data is the basic foundation for the field of statistics. The validity of any statistical study hinges on the validity of the data from the beginning of the process. Many things can come into question, such as the accuracy of the data or the source of the data. Without the proper foundation, your efforts to provide a sound analysis will come tumbling down.
 
The issues surrounding data can be surprisingly complex. After all, aren’t we just talking about numbers here? ...

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