- CFA Exams
- CFA Exam: Level I 2021
- Study Session 2. Quantitative Methods (1)
- Reading 7. Statistical Concepts and Market Returns
- Subject 3. Frequency Distributions
CFA Practice Question
A researcher has decided to create a frequency distribution using the following classes:
II. open-ended classes
III. equal class intervals
30-45, 45-60, 60-75, 76 & over
The selection of this set involves which of the following?
I. non-overlapping classes
II. open-ended classes
III. equal class intervals
Correct Answer: II
Note that "76 & over" is an open-ended class. Also, the classes are overlapping (e.g., the classes "30-45" and "45-60" have the point "45" in common).
User Contributed Comments 3
| User | Comment |
|---|---|
| viannie | can't be of equal class because of 76 & over |
| mjwoulf | If one open ended class = correct, why with 3 equal class intervals = incorrect? |
| jzty | The class interval for 76 & over is different from any other interval. |