Analyzing survey data: on constructing interval scales using data resulting from categorical jundgements
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This paper is from course material by Professor Glenn Lindsay of the Naval Postgraduate School. It provides a methodology for analyzing survey data, without assuming arbitrary numerical values for the responses to the questions (such as satisfactory = 1, good = 2, excellent = 3, etc.). This method is also valuable for analysis of "fuzzy" performance indicators which are based upon worker survey results.