Q: Determine which level of measurement— nominal, ordinal, interval, or ratio—is used in the following examples.
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• Students are asked to rank computer manufacturers

A: Nominal numbers (sometimes called categorical numbers) are numerals used for identification only. The numerical value is irrelevant, and they do not indicate quantity, rank, or any other measurement. [ Example would be ZIP code
Ordinal numbers represent rank in a particular order
Interval is a set of real numbers with the property that any number that lies between two numbers in the set is also

included in the set. For example, the set of all numbers x satisfying 0 ? x ? 1 is an interval which contains 0 and 1, as well as all numbers between them. Other examples of intervals are the set of all real numbers , the set of all negative real numbers, and the empty set.
Ratio is a relationship between two numbers of the same kind[1] (i.e., objects, persons, students, spoonfuls, units of whatever identical dimension), usually expressed as "a to b" or a:b, sometimes expressed arithmetically as a dimensionless quotient of the two[2] which explicitly indicates how many times the first number contains the second (not necessarily an integer).[3 ]

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Asked 10/15/2012 6:42:36 PM

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