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Can you calculate standard deviation without the individual counts?

April 26, 2017CALCULATE counts deviation individual Mathematics standard statistics

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Can you calculate standard deviation without the individual counts?

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Since you only know the total population count and total weight, I do not believe there is a way to calculate the standard deviation. While you can identify the mean weight with your data, you will not be able to calculate how the weight of each individual varies versus the mean — a key step to calculating the standard deviation. Standard Deviation Definition: Standard deviation is a statistical measure of spread or variability.The standard deviation is the root mean square (RMS) deviation of the values from their arithmetic mean. Sources: http://www.easycalculation.com/statistics/learn-standard-deviation.