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Chapter 1 notes, including section 7.8 for students

Chapter 1 notes, including section 7.8 for students -...

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Chapter 1: Data and Statistics Key Terms: Statistics- the science of collecting, analyzing, presenting, and interpreting data. Data- the facts and figures collected, analyzed, and summarized for presentation and interpretation. Data Set- all the data collected in a particular study Elements- the entities on which data are collected (sometimes elements are called units, individuals, subjects depending on the framework) Variable- a characteristic of interest for the elements Observation- the set of measurements obtained for a particular element Nominal Scale- the scale of measurement for a variable when the data are labels or names, and is used to identify an attribute of an element Ordinal Scale- the scale of measurement for a variable if the data demonstrate the properties of nominal data and the order or rank of the data is meaningful. Ordinal data may be nonnumeric or numeric as well. Interval Scale- the scale of measurement for a variable if the data demonstrate the properties of ordinal data and the interval between values is expressed in terms of a fixed measure. Interval data are ALWAYS
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