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Measurement scales and their summary statistics

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In any study, observations on each individual are made. These observations vary both between and within individuals and are thus referred to as “variables.” We may summarise the data collected in a study either numerically, in the form of summary statistics, or in tabular or graphical form. The advantage of the first is that individual statistics (such as means or proportions) can be used to summarise the data simply; on the other hand all, or most, of the data can be presented in a table or figure. The appropriate summary method (as well …

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