Friday , December 6 2019
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Tag Archives: statistics

Cluster Analysis and Hockey

The sports business analytics class is going to learn cluster analysis tomorrow, specifically k-means cluster analysis. The lectures lately discussed some methods of data analysis, ways to go about adjusting the data and some basic linear fit. It seemed a logical extension to go further and look at clustering. While we look at a few types of data for tomorrow we will look at salary and points. We will look at these in levels as well as differences from the five year average for...

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A rubbish clean-up

That rubbish set of stats over at the Keep New Zealand Beautiful website, noted earlier this week, is now corrected.The National Litter Audit website has been purged of the bogus numbers, and the report updated.This is good.Unfortunately, in the absence of any more formal retraction or notice from them to the journalists that reported so credulously on the figures, we're unlikely to see either any correction or any updated stories noting the figures are wrong.

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Afternoon update

The worthies of the afternoon closing of the browser tabs:A decade ago, I recommended a method for selecting decent baby names that began with a domain of names with historic standing and selected out recently popular names (see also here). There's now a spreadsheet with the top-100 baby names in New Zealand going back to 1954 over on the government's Smart Start website (where you can register births, etc). HT: FigureNZ I'm not going to link to the NZ Herald's stupid clickbait version of an...

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The BBC and Statistics

If you think this is not the most exciting blog post title, then you will get part of the problem identified in a reporton that very subject. The report does not pull its punches. For example:"We were surprised that an organisation the size of the BBC, with a high (and increasing) volume of statistics in its outputs, does not itself have an explicit expert statistical capability. If guidelines were issued advising journalists to seek statistical advice, virtually noone we talked to could...

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Be confident

Be confident April 7, 2016 in statistics When explaining the meaning of a confidence interval don’t say “the probability that the parameter is in the interval is 0.95” because probability is a precious concept and this statement does not match the meaning of this term. Instead, say “We are 95% confident that the parameter is in the interval”.  Admittedly, I don’t know what people will make of the word “confident”. But I also don’t know what they will make of the word...

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The war on p-value

The war on p-value April 6, 2016 in statistics If you live under the impression that in order to publish an empirical paper you must include the sentence “this holds with p-value x” for some number x<0.05 in your paper, here is a surprising bit of news for you: The editors of Basic and Applied Social Psychology have banned p-value from their journal, along with confidence intervals. In fact, according to the editorial, the state of the art of statistics “remains uncertain”...

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Using economic statistics in an impartial and informed way

The BBC Trust is conducting a review on this issue, and has put out a public call for evidence. I thought I might reproduce my own evidence here because it may be of wider interest. I've decided to do this prior to actually submitting it, so that readers can add in comments any examples that go with the theme of what I am saying that would bolster my case. Note that the review is specifically about the use of statistics rather than economics.Draft submissionI would just like to make a few...

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India’s confusingly speedy economy and very own deflator problem

INDIA CLOCKS IN AT 7.4 PER CENT REAL GDP GROWTH AND IS NOW THE WORLD’S FASTEST GROWING BRIC ECONOMY! *cough* Sorry. Got carried away by charts like this one from BofAML: Or this one from Deutsche that has India growing at 7.8 per cent in 2017 (with inflation running at a v decent 5 per cent): Thing is, and as we’ve written before, there is still a lack of confidence in India’s recently updated economic growth series showing up in our inboxes even as the room for caveats in the media gets...

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