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Issue with understanding Standard Deviation results

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The mean minus the s.d.  need not be meaningful.  If you flipped a fair coin, and one side had 0, and the other side had 1 on it, the mean is 0.5, but the s.d. is 0.707 (1/sqrt(2)).

Anyway is a team a thing belonging to a user, or is a user a member of a team?
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Your data is heavily positively skewed, so looking one standard deviation to the left of the mean is going to look very different to looking one standard deviation to the right.

Basically the standard deviation is quite high because it is being skewed by the higher, less frequent numbers.

Maybe comparing upper and lower quartiles and drawing a box and whisker plot would be more informative?

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