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Investigation - power outages in the UK

Posted 5 years ago
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POSTED BY: Henry Jaspars
7 Replies

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POSTED BY: Moderation Team
Posted 5 years ago
POSTED BY: Henry Jaspars

Thank you for your detailed answer. Some parts still not sufficiently explained, for example you are using a variable called newfreqs when you are comparing the distribution of the frequencies with Normal distribution instead of the usual variable frequencies but you didn't show what this newfreqs is. I am asking about that because the frequencies are not normally distributed

h = DistributionFitTest[Last /@ frequencies, Automatic, "HypothesisTestData"]
h["TestDataTable", All]

Long story short, I think it is too early to judge that the blackout is not by chance specially that it happened only twice in 8 years, so using the word systematic is harsh. You still can be write but it needs more investigation I think.

POSTED BY: Ahmed Elbanna
Posted 5 years ago
POSTED BY: Henry Jaspars
POSTED BY: Kapio Letto
Posted 5 years ago

I had already tried this, but was not pleased with the results.

In[1]: dist = FindDistrubution[Last/@frequencies]

Out[1]: StudentTDistribution[50.0054, 0.0739269, 8.64764]

In[2]: Show[Histogram[Last /@ frequencies, Automatic, "ProbabilityDensity"], 
 Plot[PDF[dist, x], {x, 49.7, 50.3}, 
  PlotStyle -> Thick]]

which gave:

graph

which doesn't seem like a particularly good fit. Others from the best solutions do not seem particularly accurate either.

POSTED BY: Henry Jaspars

Nice post. I still don't see from where did you get the conclusion that the blackout is not just a statistical mishap. Can you explain it more to me please?

POSTED BY: Ahmed Elbanna
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