What is the level of measurement of the variable presented in this table?
Table 1 Frequency Counts and Percentages on Center for Epidemiologic Studies Depression Index
(CES-D) Scores
Range of Scores total n=120 percentage%
0-15 (not depressed) 76 63
16-20 mild depression 15 12.5
21-30 moderate depression 15 12.5
> or equal to 31severe dep 14 12
a.Nominal
b.Ordinal
c.Interval
d.Ratio