Lecture 2

Lecture 2 - The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL...

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1/15/08 Lecture 2 1 STOR 155 Introductory Statistics Lecture 2: Displaying Distributions with Graphs The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL

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1/15/08 Lecture 2 2 Recall Statistics is the science of data . Collecting Analyzing Decision making Fundamental concepts: Population, parameter, sample, statistic, sample size. Any questions?
1/15/08 Lecture 2 3 Chapter 1: Looking at Data - Distributioins 1.1 Displaying Distributions with Graphs 1.2 Displaying Distributions with Numbers 1.3 Density Curves and Normal Distributions

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1/15/08 Lecture 2 4 NBA Draft 2005 Name Team Nationality Weight Height A. Bogut Milwaukee Bucks Australia 245 7-0 M. Williams Atlanta Hawks US 230 6-9 D. Williams Utah Jazz US 210 6-3 C. Paul New Orleans Hornets US 175 6-0 R. Felton Charlotte Bobcats US 198 6-1
1/15/08 Lecture 2 5 Data contain Individuals : the subjects described by the data; Variables : any characteristic of an individual. A variable can take different values for different individuals.

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1/15/08 Lecture 2 6 NBA Draft 2005 Name Team Nationality Weight Height A. Bogut Milwaukee Bucks Australia 245 7-0 M. Williams Atlanta Hawks US 230 6-9 D. Williams Utah Jazz US 210 6-3 C. Paul New Orleans Hornets US 175 6-0 R. Felton Charlotte Bobcats US 198 6-1
1/15/08 Lecture 2 7 A categorical variable places an individual into one of several groups or categories. A quantitative variable takes numerical values for which arithmetic operations such as adding and averaging make sense.

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1/15/08 Lecture 2 8 NBA Draft 2005 Categorical variables Team, Nationality Quantitative variables Weight, Height Name Team Nationality Weight Height A. Bogut Milwaukee Australia 245 7-0 M. Williams Atlanta US 230 6-9 D. Williams Utah US 210 6-3 C. Paul New Orleans US 175 6-0 R. Felton Charlotte US 198 6-1
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Lecture 2 - The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL...

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