Which level of measurement is indicated when referring to a temperature of 70° F?
a. Interval
b. Nominal
c. Ordinal
d. Ratio
ANS: A
Interval-scale measurement is distinguished from ratio level in that there is no zero point on the interval scale. A temperature of zero does not indicate the absence of temperature. Changes in temperature, however, have equal numerical distance between the intervals of the temperature scale, and the temperature value is expressed as a continuum. These properties indicate an interval level of measurement.
Nominal level of measurement simply "names" the categories.
In ordinal-scale measurement, data are assigned to categories than can be ranked.
Ratio level of measurement meets requirements for interval and has an absolute zero.
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