They explained what they meant by variation in point #3. We quantified this variation by first calculating the standard deviation of the daily sharing rate (i.e. how much sharing levels varied day by day), then dividing by the mean to give us the coefficient of variation.
Ah, I missed their explanation. The 196% and 338% are still bizarrely high figures, given that the variance of a Poisson distribution equals the mean. 338% variance, and you don't ask what kind of distribution you're measuring?
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They explained what they meant by variation in point #3. We quantified this variation by first calculating the standard deviation of the daily sharing rate (i.e. how much sharing levels varied day by day), then dividing by the mean to give us the coefficient of variation.
Ah, I missed their explanation. The 196% and 338% are still bizarrely high figures, given that the variance of a Poisson distribution equals the mean. 338% variance, and you don't ask what kind of distribution you're measuring?