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Help with statistics

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#1 semperfi



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Posted 02 January 2011 - 01:32 AM

hi there. how do you figure out how to determine the means and sd from other data that is given instead of raw data. More papers publish medians, maximum and minimum values, quartiles, etc. Even to determine the standard deviation of either the mean or median, formulas require the user knowing the raw data. But how can you figure out the mean value of a set of data when you know sample number, median and the maximum and minimum values from that data set?
e.g. n=21, median=24, mim-max=17-28

thank you inadvance for your help

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