Unit 1-1

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

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Chapter 1 & 3
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Statistics the science of collecting, analyzing, and drawing conclusions from data
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Descriptive statistics the methods of organizing & summarizing data
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Inferential statistics involves making generalizations from a sample to a population
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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
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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
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Types of variables
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Categorical variables or qualitative identifies basic differentiating characteristics of the population
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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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Unit 1-1 - Chapter 1 & 3 Statistics the science of...

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