- CFA Exams
- CFA Level I Exam
- Study Session 3. Quantitative Methods (2)
- Reading 9. Common Probability Distributions
- Subject 3. Cumulative Distribution Function

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**CFA Practice Question**

A cumulative frequency distribution of days absent during a calendar year by employees of a manufacturing company is shown below.

How many employees were absent between 6 and 11 days?

A. 8

B. 12

C. 20

**Explanation:**This answer is found by examining the difference between the 6-8 class and the 12-14 class. In this case: 14 - 2 = 12.

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**User Contributed Comments**
4

User |
Comment |
---|---|

dimos |
WHY NOT 20? |

dimos |
ok, thanks for your interest but I just realized that is cumulative....good luck to all of you anyway |

ljamieson |
lol. I got caught on the cumulative part too. |

Trev186 |
I get the cumulative thing now but my question is how come the frequency distribution is counting up in reverse order? I thought it always had to go in ascending order? This just fools you because you count the opposite way. |