COVID: Sweden was right. Everyone else was wrong.
(twitter.com)
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Not really clear on the math here...
It's the sum of the difference? Like, we're subtracting the actual deaths from the average and then adding them to...what? The previous value? The average?
If it's just the difference, ie average minus actual deaths, doesn't that mean Sweden did the worst?
I think it's phrased a bit weirdly. By sum of the 'difference', I think they just mean they are summing up excess deaths and deaths at each period and then comparing the difference to get the %s. Usually a cumulative graph would be something like this (and I would assume it is here):
Raw data:
Jan: Actual deaths 400; Average deaths 500
Feb: Actual deaths 600; Average deaths 500
Mar: Actual deaths 1000; Average deaths 500
Cumulative deaths as a % of the average cumulative deaths:
Jan - (400/500)-1 = -20%
Feb - (1000/1000)-1 = 0%
Mar - (2000/1500)-1 = 33.3%