QA 233_ Note 1 - Statistics The art and science of...

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Unformatted text preview: Statistics The art and 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. 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 used to identify an attribute of an element. Nominal data may be nonnumeric or numeric. Ordinal scale The scale of measurement for a variable if the data exhibit the properties of nominal data and the order or rank of the data is meaningful. Ordinal data may be nonnumeric or numeric. 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 unit of measure. Interval data are always numeric.interval between values is expressed in terms of a fixed unit of measure....
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