A box and whisker graph is a visual representation of your data that highlights key points, such as the mean and the location of each quartile. Your upper quartile is 75% to 100% of your figures. If the numbers on your number line are a percentage, then you are trying to find a percentage that aligns with the 75 percentile. Using your box and whisker plot, you can quickly determine this number using the number line and the box part of the plot.
Instructions
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1
Go to the right end of the box part of the whisker and box plot. This is the spot that marks the 75th percentile.
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2
Draw a line down from the 75th percentile to the number line beneath the box and whisker plot.
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3
Circle the percentage on the number line. This is the lowest percentage in the upper quartile.