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| Qualitive - Pertaining to the subjective nature of some variable of interest, that is, something that can be rated but not objectively reduced to an unambiguous scale. For example, view is a qualitative factor. |
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| Quality class - A subjective classification of a structure by an appraiser; intended to describe materials used, workmanship, architectural attractiveness, functional design, and the like. Quality class, or its synonym grade, is the key variable in most cost schedules . |
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| Quantitative - Pertaining to the objectiv e nature of some variable of interest, that is, something that can be measured or counted with little ambiguity. For example, number of bathrooms is a quantitative variable. |
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| Quantity survey method - A method of estimating reproduction cost in which a complete itemization is made of all labor and material costs by component and subcomponent and all indirect costs; these are added to obtain an estimate of the cost of a structure or a reasonable bid for a contractor to submit on a proposed project. |
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| Quartiles - The values that divide a set of data into four equal parts when the data are arrayed in ascending order. The first quartile is the value below which the lowest quarter of the data falls, the second quartile is the median , and so forth. |
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| Quasi rent - See economic rent . |
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| Quotient transformation - A transformation of two or more variable accomplished by dividing one by the other. For example, the length of a room is a quotient transformation of its area and its width. Like the multiplicative transformation , many useful quotient transformations are less intuitively obvious than the one in the example given. |
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