- CFA Exams
- 2021 CFA Level I Exam
- Study Session 2. Quantitative Methods (1)
- Reading 7. Statistical Concepts and Market Returns
- Subject 2. Measurement Scales

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**CFA Practice Question**

If thirty students listed the distance that they drive to school, this data would be what level of measurement?

B. interval

C. ratio

A. ordinal

B. interval

C. ratio

Correct Answer: C

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**User Contributed Comments**
8

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

Khadria |
Can't be ratio because there is NO absoulte 0 (distance has to be >0)... |

Khadria |
IGNORE MY PREVIOUS COMMENT!!! I think Ratio has to be seen from the angle whether or not the ration among the numbers is meaningful or not. Hence in this case, ratio is correct. |

bobert |
There are proper intervals (1 mi.) and someone could technically live on campus which would make it 0 miles driven. Also, to further clarify, someone who drives 5 miles is only half the distance of someone who drives 10 mi. There is no multiplication/ division for interval measurements, only ratio. |

danrow |
I am confused between the difference between ratio and interval. In this case, shouldn't be interval? I mean, there is no true zero! |

chamad |
the question is excluding walking people and those going by bus, etc. So zero value is possible hence ratio is correct |

Bobokoko |
why do they ask you to make these ridiculous inferences about the question?? These aren't critical thinking questions, right?? |

johntan1979 |
Tricky one... :( |

johntan1979 |
But have to agree it DEFINITELY is not interval, whether people drive or not, because only with ratio, you can say "I drove TWICE the distance he/she drove to school." You can't say that with interval. |