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For the second time in recorded history, global sea surface temperatures hit six standard deviations above 1982-2011, on January 6 2024 (lemmy.world)

submitted 10 months ago* (last edited 10 months ago) by kinther@lemmy.world to c/world@lemmy.world

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[-] Shanedino@lemmy.world 7 points 10 months ago

Fun fact you don't need the to specify "recorded" history. The term history already takes that into account. Prehistoric refers to things before records were kept.

[-] kinther@lemmy.world 6 points 10 months ago

It's recorded sea temperatures that allowed us to track changes like this over time that I was referring to. I know that wasn't super clear by the title.

[-] Shanedino@lemmy.world 4 points 10 months ago

For the second recorded time in history...

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[-] uis@lemmy.world 4 points 10 months ago

How can standard deviation be negative?

[-] jj4211@lemmy.world 7 points 10 months ago

It isn't, but some data are a negative multiple of standard deviation away from the mean.

[-] uis@lemmy.world 2 points 10 months ago

Same question as in another subthread

[-] KnowledgeableNip@leminal.space 6 points 10 months ago

It's deviations from the mean, so if the deviation were "3" for example, values of 6, 3, 0, -3 and -6 would be 2, 1, 0, -1, and -2 deviations away from the central line, respectively.

[-] uis@lemmy.world 4 points 10 months ago* (last edited 10 months ago)

Deviation != standard deviation

Standard deviation is square root of sums of squared deviations divided by number of samples. Only complex numbers can result in negative values when squared. Negative amout of samples makes even less sense.

Deviation from mean is x - μ, standard deviation is this abomination:

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this post was submitted on 08 Jan 2024

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