A blood hemoglobin measurement of 13.5 g/100 mL would be which level of measurement?
a. Interval
b. Nominal
c. Ordinal
d. Ratio
ANS: D
Ratio-scale measurement, the highest form of measurement, has an absolute zero point. This means the value of zero indicates the absence of the property being measured. In this case because we could have a hemoglobin measurement of zero, we determine that hemoglobin is measured at the ratio level.
Interval level of measurement has equal intervals between each designation.
Nominal level of measurement simply "names" the categories.
In ordinal measurement, data are assigned to categories than can be ranked.
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