Chapter 1- Introduction to Data

Just a statistics trick there are three kinds of lies

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Unformatted text preview: respect. “ Just a statistics trick”. “There are three kinds of lies: lies, damned lies, and statistics.” Statistics courses are usually not students’ first choice for a fun elective class. Professor: Dai-Trang Le Chapter 1 – Introduction to Data January 8, 2014 10 / 32 What are data? Statistics “You can prove anything with Statistics?” A. TRUE B. FALSE Statistics gets no respect. “ Just a statistics trick”. “There are three kinds of lies: lies, damned lies, and statistics.” Statistics courses are usually not students’ first choice for a fun elective class. Professor: Dai-Trang Le Chapter 1 – Introduction to Data January 8, 2014 10 / 32 What are data? Statistics “You can prove anything with Statistics?” A. TRUE B. FALSE Statistics gets no respect. “ Just a statistics trick”. “There are three kinds of lies: lies, damned lies, and statistics.” Statistics courses are usually not students’ first choice for a fun elective class. Professor: Dai-Trang Le Chapter 1 – Introduction to Data January 8, 2014 10 / 32 What are data? Statistics “You can prove anything with Statistics?” A. TRUE B. FALSE Statistics gets no respect. “ Just a statistics trick”. “There are three kinds of lies: lies, damned lies, and statistics.” Statistics courses are usually not students’ first choice for a fun elective class. Professor: Dai-Trang Le Chapter 1 – Introduction to Data January 8, 2014 10 / 32 What are data? What are data? What are data? Data are numbers or values in context. A list of numbers: 8.32, 7.91, 9.64, 9.18, 10.33,7.46 What can you say if this list represents? Birth Weights Price in dollars and cents for gas Commuting distances Professor: Dai-Trang Le Chapter 1 – Introduction to Data January 8, 2014 11 / 32 What are data? What are data? What are data? Data are numbers or values in context. A list of numbers: 8.32, 7.91, 9.64, 9.18, 10.33,7.46 What can you say if this list represents? Birth Weights Price in dollars and cents for gas Commuting distances Professor: Dai-Trang Le Chapter 1 – Introduction to Data January 8, 2014 11 / 32 What are data? What are data? What are data? Data are numbers or values in context. A list of numbers: 8.32, 7.91, 9.64, 9.18, 10.33,7.46 What can you say if this list represents? Birth Weights Price in dollars and cents for gas Commuting distances Professor: Dai-Trang Le Chapter 1 – Introduction to Data January 8, 2014 11 / 32 What are data? What are data? Data are observations that you or someone else records Data can be numeric Measurements: Weight, Height, Distance, etc. Number of Customers Data can be nonnumeric or categorical Months, Days in a Week Ethnicities of each student on campus Professor: Dai-Trang Le Chapter 1 – Introduction to Data January 8, 2014 12 / 32 What are data? Numerical or Categorical? Categorical Data are often coded using numbers. Al...
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