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The lower quartile {eq}Q1 {/eq} is the median of the lower half $$58,67,69,75 $$ namely $$Q1=\frac{67+69}{2}=\frac{136}2=68 $$ The upper quartile {eq}Q3 {/eq} is the median of the
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How do I find the lower quartile and upper quartile? Re-arrange your data from lowest to highest Find the median, which is the data at: (how many data +1)/2 Split the ordered data into two
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Formula for Lower quartile (Q1) = N + 1 multiplied by (1) divided by (4) Formula for Middle quartile (Q2) = N + 1 multiplied by (2) divided by (4) Formula for Upper quartile (Q3) = N