If you measured age by calculating the difference between the year a respondent was interviewed and the year the respondent was born, then your level of measurement would be __________; if you measured age by placing people in one of four categories (18 and under, 19-39, 40-59, 60 and over), then your level of measurement would be __________.
A) ratio; ratio
B) ratio; interval
C) ratio; ordinal
D) ordinal; ordinal

Question

Quizplus · Accepted Answer

The first method provides a ratio level of measurement because age is a continuous variable with a true zero point. The second method is ordinal because it categorizes age into ordered groups without a true zero point.

If You Measured Age by Calculating the Difference Between the Year