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Lecture01

# Lecture01 - Introduction to Statistics Statistics 110...

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Introduction to Statistics Statistics 110, Spring 2010 Professor Edsel A. Pe~na E-Mail: [email protected] January 12, 2010 Lecture 01 Introduction and Scope of Statistics Professor Edsel A. Pe~na E-Mail: [email protected] Introduction to Statistics Statistics 110, Spring 2010

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Why Study Statistics? I A required course! I Will ful ll a General Education (GE) requirement; I and is, perhaps, easier than a Calculus or an Algebra course! I But, why, indeed, is it a required course? I Or, why is it now an integral component of the General Education curriculum? I There’s got to be a more compelling reason for requiring students to study Statistics than just having another course to take! I What are these reasons, especially after we hear of the following popular enduring phrases about the eld of Statistics? Professor Edsel A. Pe~na E-Mail: [email protected] Introduction to Statistics Statistics 110, Spring 2010
Enduring Popular Statements about Statistics Lies, Damned Lies, and Statistics! [Disraeli, former British Prime Minister] or You could prove ANYTHING with Statistics! Professor Edsel A. Pe~na E-Mail: [email protected] Introduction to Statistics Statistics 110, Spring 2010

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Misuse and Abuse of Statistics I Such popular phrases arose because the Tools of Statistics are not properly used. I If bad data is used with statistical methods, then bad conclusions will also arise! I Many who use statistical tools do not understand some of the subtleties involved in these tools. I Give a computer numbers and it will spit back numbers too! . But the numbers may not mean anything or may even be misleading! I Data could be bad data due to poor experimental design, careless data gathering, cooked data, etc. These are things we hope to learn to avoid or recognize. I There is a saying: Garbage In, Garbage Out! Professor Edsel A. Pe~na E-Mail: [email protected] Introduction to Statistics Statistics 110, Spring 2010
This Course Will Try To Convince You That ... I Statistics is a window to the unknown. It is not the best way to discover the truth, but rather it is the second best method. However, the rst and best method is not practical nor doable due to time and resource constraints. I We live in a technological and data-centric world. Data are gathered from you in supermarkets, telephone surveys, from your purchases, phone conversations, etc. I But, data or information by themselves is not Knowledge. To get Knowledge from data we need the tools of Statistics. I Subject called Data Mining which uses statistical tools: literally mines huge data bases to see what you are interested in, such as books (Amazon), movies (NetFlix), tele-marketing, etc. Professor Edsel A. Pe~na E-Mail: [email protected] Introduction to Statistics Statistics 110, Spring 2010

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Drowning in Information I \Drowning in Information, but Starving for Knowledge!" ...
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