alleryStart learning →The first quartile of an ordered data set is the same as which percentile?
AThe 50th
BThe 75th
CThe 25th
DThe 90th
Answer & Solution
Correct answer: C. The 25th
1. Quartiles cut ordered data into four equal parts.
2. One quarter of the data lies at or below the first quartile.
3. One quarter is 25 percent, so the first quartile is the 25th percentile.
_Source: OpenStax High School Statistics (CC BY 4.0), Ch 2 "Descriptive Statistics" and Ch 3 "Probability Topics", section 2.3 Measures of the Location of the Data_
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