Chance News 110: Difference between revisions

From ChanceWiki
Jump to navigation Jump to search
Line 5: Line 5:


----
----
"They [new planet candidates] are fascinating, but Kepler’s mission is not to pinpoint the next tourist destination — it is to find out on average how far away such places are. Or, as Dr. Batalha said, ''We’re not stamp collecting, we’re doing statistics.'' ”
"They [new planet candidates] are fascinating, but Kepler’s mission is not to pinpoint the next tourist destination — it is to find out on average how far away such places are. Or, as Dr. Batalha said, ''We’re not stamp collecting, we’re doing statistics.''”


<div align=right>-- in: [https://www.nytimes.com/2017/06/19/science/kepler-planets-earth-like-census.html Earth-size planets among final tally of NASA’s Kepler telescope], ''New York Times'', 29 June 2017</div>
<div align=right>-- in: [https://www.nytimes.com/2017/06/19/science/kepler-planets-earth-like-census.html Earth-size planets among final tally of NASA’s Kepler telescope], ''New York Times'', 29 June 2017</div>

Revision as of 23:58, 19 June 2017

Quotations

“When a coincidence seems amazing, that’s because the human mind isn’t wired to naturally comprehend probability and statistics.”

-- Neil deGrasse Tyson, quoted in: Coincidences are underrated, OUPBlog, 27 May 2017

"They [new planet candidates] are fascinating, but Kepler’s mission is not to pinpoint the next tourist destination — it is to find out on average how far away such places are. Or, as Dr. Batalha said, We’re not stamp collecting, we’re doing statistics.

-- in: Earth-size planets among final tally of NASA’s Kepler telescope, New York Times, 29 June 2017

Forsooth

“[Richard] Florida finds that this population [service workers] currently splits its vote evenly between the two parties — ‘no statistical significance for either Trump or Clinton.’ ”

in: Where Democrats can find new voters, New York Times, 15 June 2017.

Statistical artifacts

Artifacts (from XKCD [1])

Artifacts-XKCD.png

Suggested by Michelle Peterson

Crowd size

From Lincoln to Obama, how crowds at the capitol have been counted
by Tim Wallace, New York Times, 18 January 2017

Donald Trump's "truthful hyperbole" (a negotiating strategy he describes in The Art of the Deal) has now become a regular feature political debate. This article anticipates

[2] The simple math behind crunching the sizes of crowds "I feel that it’s important to note that estimating crowd sizes is a solved problem that’s actually pretty straightforward."

Crowd estimates from Chance News 68, Glenn Beck and competing rally by John Stewart and Stephen Colbert.

Laurie Snell [3] 2003 San Francisco protest of the Iraq war. Reminds us that in 1995 the Nation of Islam threatened to sue the Park Service over its crowd estimates for Louis Farrakhan's Million Man March.

Still thinking about the election

Margaret Cibes sent a link to the following:

The 2016 national polls are looking less wrong after final election tallies
by Scott Clement, Washington Post, 6 February 2017

Gender stereotypes

Nick Horton sent the following to the Isolated Statisticians list-serv:

Gender stereotypes about intellectual ability emerge early and influence children’s interests
by Lin Bian, Sarah-Jane Leslie, Andrei Cimpian, Science, 27 January 2017

The full article requires a subscription. From the summary on the web page we read:

The distribution of women and men across academic disciplines seems to be affected by perceptions of intellectual brilliance. Bian et al. studied young children to assess when those differential perceptions emerge. At age 5, children seemed not to differentiate between boys and girls in expectations of “really, really smart”—childhood's version of adult brilliance. But by age 6, girls were prepared to lump more boys into the “really, really smart” category and to steer themselves away from games intended for the “really, really smart.”

Nick recommended this study for use in class for a number of reasons, including the fact that available for download from the Open Science Framework, and the analyses are quite accessible with tools such as the t-test and the chi-squared test.

Here is a newspaper story about the study:

Why young girls don’t think they are smart snough
by Andrei Cimpian and Sarah-Jane Leslie, New York Times, 26 January 2017

Hans Rosling

Margaret Cibes sent a link to the following:

Hans Rosling, Swedish doctor and pop-star statistician, dies at 68
by Sam Roberts, New York Times, 9 February 2017

Gapminder

Gapminder Effect has been measured

GoogleVis and R

Gaussian correlation inequality

Pete Schumer sent a link to the following:

A long-sought proof, found and almost lost
by Natalie Wolchover, Quanta, 28 March 2017

paper can be found here. Blog discussion here.

Flint water crisis

The murky tale of Flint's deceptive water data
by Robert Langkjær-Bain, Significance, 5 April 2017

What went wrong In Flint
by Anna Maria Barry-Jester, FiveThirtyEight, 26 January 2016

Same stats (think Anscombe)

Jeff Witmer sent the following link to the Isolated Statisticians list.

Same stats, different graphs: Generating datasets with varied appearance and identical statistics through simulated annealing
by Justin Matejka, ACM SIGCHI Conference on Human Factors in Computing Systems

Observing that it is not known how Frank Anscombe went about creating his famous quartet of scatterplots, the authors present the results of their simulated annealing technique to produce some striking visualizations. Worth a look just to see their Datasaurus Dozen, which even has an R data package.

The fivethirtyeight package for R

fivethirtyeight Package
by Albert Y. Kim, Chester Ismay, and Jennifer Chunn, announced 13 March 2017

The authors have developed a package for pedagogical use that provides data and R code corresponding to analyses presented at FiveThirtyEight.com. Their goal is to allow students to get into the data with minimal overhead.

This should be a very valuable resource for teaching about statistics in the news! Here is a quick illustration of how to use the package. More details are available in the package vignette linked above.

Debate over white mortality

Stop saying white mortality Is rising
by Jonathan Auerbach and Andrew Gelman, Slate, 28 March 2017

The forces driving middle-aged white people's 'deaths Of despair'
by Jessica Boddy, NPR Morning Edition, 23 March 2017


Interracial marriage

Peter Doyle sent a link to this chart from the Economist:

Daily chart: Interracial marriages are rising in America
Economist, 12 June 2017
Economist 50yrsLoving.png,

Quoting from the article, one reader commented:

"Of the roughly 400,000 interracial weddings in 2015, 82% involved a white spouse, even though whites account for just 65% of America’s adult population. " If you lump the population into just two groups A and B, 100% of intergroup marriages will involve a spouse from group A, no matter what fraction of the population belongs to group A.

Exercise: 2015 census data is available by googling "us census quickfacts". While the categories don't precisely match those in this piece, you can use this data to get a rough estimate the fraction of interracial weddings that would involve a white spouse under random pairing. What do you get? Is your answer more or less than 82%?

Peter notes that he got just over 82%. Here is his solution (using Mathematica):

Doyle marriage.png