alleryStart learning →Three students out of a class of 40 scored between 90 and 100 percent. What is the relative frequency for that group?
A0.750
B0.300
C0.030
D0.075
Answer & Solution
Correct answer: D. 0.075
1. Relative frequency is the count for a group divided by the total number of values.
2. Here the count is 3 and the total is 40.
3. Three divided by 40 is 0.075.
4. That is 7.5 percent of the class, not 75 percent, so the second option is off by a factor of ten.
_Source: OpenStax High School Statistics (CC BY 4.0), Ch 2 "Descriptive Statistics" and Ch 3 "Probability Topics", section 2.2 Histograms, Frequency Polygons, and Time Series Graphs_
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