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Amazon accuses customer of racism & shuts down their smart home!
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Monkeh:

--- Quote from: gnuarm on July 02, 2023, 05:38:07 pm ---This would indicate a change in the way the data is collected and/or processed, not an actual change in the thing being measured.

--- End quote ---

Or it does indicate a change in the data being measured that you just don't want to see. The criteria didn't change, the methods didn't change.
PlainName:

--- Quote ---I can't think of anything that happened in 1st or 2nd quarter of 2020 to cause such a step function
--- End quote ---

Covid lockdown? Over here that resulted in clear roads, so drivers were doing stupid speeds expecting not to meet something in the way. I can easily imagine a higher death rate despite fewer miles travelled.
TimFox:
I remember this incident   https://www.cnn.com/2020/04/15/us/chicago-kennedy-expressway-pileup-trnd/index.html  in Chicago, during the early Covid lockdown in Illinois.
The expressway had relatively little traffic due to the lockdown, and iced up badly.
This was followed by perhaps not-so-intelligent driving.
Luckily, no fatalities.
However, 2020 and 2021 were bad for traffic fatalities in Illinois.
An example of postings from personal-injury attornies:  https://www.chicagolawyer.com/blog/chicago-car-accident-statistics-for-2022/
gnuarm:

--- Quote from: PlainName on July 02, 2023, 05:48:53 pm ---
--- Quote ---I can't think of anything that happened in 1st or 2nd quarter of 2020 to cause such a step function
--- End quote ---

Covid lockdown? Over here that resulted in clear roads, so drivers were doing stupid speeds expecting not to meet something in the way. I can easily imagine a higher death rate despite fewer miles travelled.

--- End quote ---

Sure, if the step had gone away after things opened up again.  But this step has remained.  It was both abrupt, and significant, around 30%!

I don't follow why you think reducing the number of miles driven, would increase the death rate per mile.  It's not like cars spontaneously blow up on their own.  In fact, fewer people on the roads should result in safer driving with fewer fatalities, I would think.  While the number of people on the roads dropped, I never saw "clear" roads. 
PlainName:

--- Quote ---I don't follow why you think reducing the number of miles driven, would increase the death rate per mile.
--- End quote ---

Might, not would. And it's not just my idea.

The thinking is that with less traffic drivers drive more carelessly (because there's nothing to get in the way) and when something does get in the way the resulting damage is worse because of the higher speeds and lack of attention. There was actually quite a lot on this in the papers at the time, because the police were picking up serious speeders where normally congestion would tamp it down.

So, fewer vehicles implies fewer miles for a given period, and higher carelessness can lead to more incidents per driven mile (even though the absolute number of incidents might reduce).

Anyone else not able to grasp that? Like is it me unable to explain an idea or am I being played?
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