单选题 Lee Pickett, CFA. a well-known and respected analyst, follows the computer industry and does research about types of measurement scales. Pickett categorizes a group of stocks into quartiles based on historical rate of returns. Pickett's approach is most consistent with which type of the following measurement scales?
A. Nominal.
B. Ratio.
C. Ordinal.

【正确答案】 C

【答案解析】[解析] Pickett按股票的历史回报率高低将股票分为4个区间，有大小的顺序，符合顺序度量(Ordinal scale)的定义。名义度量(Nominal scale)不考虑先后顺序。比例度量(Ratio scale)既要考虑顺序，还要考虑区间，还需要有真实零点，要求最为严格。