# N_0515 - Chapter One Learning Objective To understand HOW and WHY we summarize data Chapter 1 Section 1.1 1 WHY do we summarize data Lists or

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Chapter 1 Section 1.1 1 Chapter One Learning Objective: To understand HOW and WHY we summarize data

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Chapter 1 Section 1.1 2 WHY do we summarize data? Lists or tables of numbers are difficult for our brain to process. We can organize numbers so that we can answer some specific questions. Observations based on data help us make better decisions about business and our personal lives
Chapter 1 Section 1.1 3 Individuals vs. Variables An individual is the thing we count, such as students, cars, countries or invoice statements A variable is some characteristic about the individual. Students - grade point average, year in school Cars - color, price Countries - population, type of climate Invoice statements - number of errors, customer name

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Chapter 1 Section 1.1 4 Categorical vs. Quantitative Variables Categorical variables puts individuals into one of several groups or categories. Quantitative variables takes numerical values for which arithmetic operations such as adding and averaging make sense.
5 HOW do we summarize data? Using pictures

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## This note was uploaded on 02/27/2008 for the course BCOR 1020 taught by Professor Liang,fang during the Summer '07 term at Colorado.

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N_0515 - Chapter One Learning Objective To understand HOW and WHY we summarize data Chapter 1 Section 1.1 1 WHY do we summarize data Lists or

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