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Three students in a class of 40 scored between 90 percent and 100 percent. What is the relative frequency of that group?
ARF = 0.750
BRF = 0.075
CRF = 0.133
DRF = 0.037
Answer & Solution
Correct answer: B. RF = 0.075
1. Relative frequency is the frequency divided by the total number of data values.
2. Here the frequency is 3 and the total is 40.
3. Dividing gives 3 divided by 40, which is 0.075, or 7.5 percent of the class.
4. A value of 0.750 comes from dividing 30 by 40 and inverts the two numbers, so it is far too large.
_Source: OpenStax Introductory Business Statistics (CC BY 4.0), Ch 2 "Descriptive Statistics", section 2.1 Display Data_
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