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How do you find the standard deviation of a data set of numbers? I know the...

How do you find the standard deviation of a data set of numbers? I know the median, and the upper and lower quartile numbers. I am making a box plot and need to know how to graph that on a box plot as well.

For example let us say the numbers are 1,2,3,4,5,6,7,8,9. How would you find the standard deviation?

math   Statistics-And-Probability   
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