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Lower quartile of $$$23$$$, $$$24$$$, $$$21$$$, $$$20$$$
Related calculators: Upper Quartile Calculator, Five Number Summary Calculator, Box and Whisker Plot Calculator
Your Input
Find the lower quartile of $$$23$$$, $$$24$$$, $$$21$$$, $$$20$$$.
Solution
The lower (first) quartile $$$Q_{1}$$$ is equal to the percentile no. $$$25$$$.
The percentile no. $$$25$$$ is $$$\frac{41}{2}$$$ (for steps, see percentile calculator).
Answer
$$$Q_{1} = \frac{41}{2} = 20.5$$$A