Topic 1: Sampling and Data Vocab

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Descriptive Statistics

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Organizing and Summarizing data

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Inferential Statistics

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The formal methods for drawing conclusions from data

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Population

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A collection of persons, things, or objects under study.

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Sample

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A subset of the population.

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Parameter

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A number that is a property of the population.

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Statistic

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A number that represents a property of the sample.

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Simple random sample

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A subset of a statistical population in which each member of the subset has an equal probability of being chosen.

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Stratified sample

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A population is divided into subgroups, then randomly choose a proportional amount from each subgroup.

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Cluster sample

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A population is divided into subgroups, then choose a set of subgroups to be in the sample.

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Systematic sample

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Every nth number of the population is selected to be in the sample.