Unit 1-1

# Unit 1-1 - Chapter 1 3 Statistics the science of collecting...

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Chapter 1 & 3

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Statistics the science of collecting, analyzing, and drawing conclusions from data
Descriptive statistics the methods of organizing & summarizing data

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Inferential statistics involves making generalizations from a sample to a population
Population The entire collection of individuals or objects about which information is desired

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Sample A subset of the population, selected for study in some prescribed manner
Variable any characteristic whose value may change from one individual to another

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Data observations on single variable or simultaneously on two or more variables
Types of variables

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Categorical variables or qualitative identifies basic differentiating characteristics of the population
Numerical variables or quantitative observations or measurements take on numerical values makes sense to average these values two types - discrete & continuous

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Discrete (numerical) listable set of values usually counts of items
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## This note was uploaded on 12/09/2011 for the course STATS 221 taught by Professor Nielson during the Fall '10 term at BYU.

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Unit 1-1 - Chapter 1 3 Statistics the science of collecting...

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