STATS_Lectures_Quizes_ALL

STATS_Lectures_Quizes_ALL - Week 1: Introduction and...

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Week 1: Introduction and Descriptive Statistics - Lecture Help JavaScript is required for your course. Please ensure JavaScript is enabled in your browser preferences. Print This Page Introduction and Descriptive Statistics A Little History  |  Graphs   Excel Tutorials   Statistics is a field that crosses all professions.  Virtually all professions today make use of  statistics in some manner.  Decisions are often made based upon statistical data, or upon  previous decisions that were made based upon statistical data. A Little History! Math/statistics began in India a very long time ago, and the way people thought was changed.  Picked up by Arabic peoples, it was delivered to Europe. But there was a roadblock. Rome's adopted numbers (Roman numerals like MCMLIV) slowed the  development of Europe. You can’t multiply or divide with Roman numerals. Finally Arabic numerals got to us, and the change became known. II was replaced by 2, X was  replaced by 10, and C was replaced by 100. In many ways the new and easier to use numbers were only the promise of change because very  few knew what to do with them. Arithmetic books, if you want to call them that, were all hand  copied.  Gutenberg’s printing press changed the world. It allowed for printed arithmetic books that were  relatively plentiful and relatively cheap. Boarding schools were set up around Europe and many businessmen sent sons or young  employees off to them to learn to add, subtract, multiply and divide. Slowly but pervasively,  arithmetic became the possession of regular folks. Over time, the vast majority of the population  began to think arithmetically. It was an incredible change in thought. Then, nothing happened for a long, long time. Math grew in extraordinary fashion, that's true. But 
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the thinking of almost all people remained arithmetic. Today almost everyone still thinks in  arithmetic. And yet the world has changed again, and folks a hundred years from now will no longer think  arithmetically.  The world isn't arithmetic. Arithmetic is a poor approximation of much around us. Arithmetic gives  us one exactly specific answer to a problem. That's part of its beauty and part of its downfall. Probability and statistics far better explain the world around us. Thinking probabilistically is a  better manner of thought than thinking arithmetically. Just as we weren't and then we became  arithmetic thinkers, today we aren't but tomorrow we will be probabilistic thinkers. Over the next hundred years, as probability and statistics become the common experience that 
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This note was uploaded on 12/08/2009 for the course STATS STATS430 taught by Professor Forgot during the Spring '08 term at DeVry Chicago.

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STATS_Lectures_Quizes_ALL - Week 1: Introduction and...

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