A researcher collecting ethnic data assigns the following numerical labels: 1 equals Caucasian 2 equals African American 3 equals Mexican American 4 equals Asian This is an example of which type of data?
a. Interval
b. Nominal
c. Ordinal
d. Ratio
ANS: B
Nominal-scale measurement is used when data can be organized into categories. In this example, the researcher assigned data to ethnic categories.
Interval-scale data have equal numerical distances between each point.
Ordinal data are assigned into categories that can be ranked.
Ratio meets requirements of interval data and has a true zero.
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