ISDS Test 1 Study Guide

ISDS Test 1 Study Guide - Definitions Chapter 1 Qualitative...

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Definitions Chapter 1 Qualitative Variable – categorical (ex. Yes/No, Fr./Soph./ Jr./Sr.) Quantitative – numerical, how much (ex. Weight, age, GPA) Cross-sectional data – data collected at the same point in time Time series data – data collected over several periods of time Descriptive statistics – methods involving the collection, presentation, and summarizing of a set of data in order to describe the features of the data set Inferential Statistics – methods that make possible the estimation of a characteristic of a population or making a decision about a population based only upon sample results Population – the set of all items in a particular study (the whole group) Sample – subset of the population selected for analysis (part of the whole group) Parameter – a summary measure that is computed to describe a characteristic of an entire population (describes the whole group) Statistic – a summary measure that is computed to describe a
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