BTO DRAW A BOX PLOT
21) B
To draw a box plot:
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Plot the median (That is the second quartile, half the numbers are above it and half are below it.)
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Plot the 1st quartile (That is the number below which 25% of the smallest numbers fall.)
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Plot the 3rd quartile (That is the number above which 25% of the largest numbers fall.)
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Box in the distance between the 1st and 3rd quartiles (This is called the interquartile range.)
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Plot the smallest and largest numbers (The range.)
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Plot out with a star the outliers (Those numbers falling outside 1.5 times the interquartile range.)