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I personally hated these. So say you have a set of numbers. 78, 80, 81, 83 ,and 85.

You need to find the lower quartile, upper quartile, and of course median. the highest and lowest points will be on the end. draw a box around the upper, and lower quartile and lines coming out from it connecting to 78 and 85.

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12y ago

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you must have the cumulative frequency and calculate the upper and lower quartiles.

Firstly, you must (from a set of data,) find the highest and lowest value, on a number line, plot these down using a short line. Next plot your median, upper and lower quartile range, plot these on using a larger line and join the lines up to form a box plot. You are now done!

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14y ago
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