statchap1 - Statistics The study of how to collect organize...

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1 Math 121 Statistics - Rimmer Sections 1.1, 1.2 Statistics - The study of how to r collect r organize r analyze r interpret numerical information from data. Individuals -The people or objects involved in the study Variables - The characteristic of the individual to be measured or observed. Quantitative - a numeric value height, weight, age, income gender, nationality Qualitative – a category Math 121 Statistics - Rimmer Sections 1.1, 1.2 Source of data Population –The variable is from EVERY individual of interest Sample - The variable is from only some of the individuals of interest population sample
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2 Math 121 Statistics - Rimmer Sections 1.1, 1.2 Levels of measurement r Nominal - names or qualities (data put into categories) r Ordinal - data put in order from “worst” to “best” or ranked for relative comparison (exact differences are not computed) r Interval - like ordinal, the data can be put in order, but now the differences hold meaning r Ratio - like interval, data can be ordered and
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statchap1 - Statistics The study of how to collect organize...

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