Posts filed under “Data Analysis”
From Betsey Stevenson & Justin Wolfers, a short primer on separating lies from statistics:
1. Focus on how robust a finding is, meaning that different ways of looking at the evidence point to the same conclusion. Do the same patterns repeat in many data sets, in different countries, industries or eras?
2. Results that are Statistically Significant means it’s unlikely findings simply reflect chance. Don’t confuse this with something actually mattering.
3. Be wary of scholars using high-powered statistical techniques as a bludgeon to silence critics who are not specialists.
4. Don’t fall into the trap of thinking about an empirical finding as “right” or “wrong.”
5. Don’t mistake correlation for causation.
6. Always ask “so what?” The “so what” question is about moving beyond the internal validity of a finding to asking about its external usefulness.
Great stuff. I recall something from Carl Sagan on this — I’ll see if I can dig it up.
Six Ways to Separate Lies From Statistics
By Betsey Stevenson & Justin Wolfers
Bloomberg View, May 1, 2013 http://www.bloombergview.com/articles/2013-05-01/six-ways-to-separate-lies-from-statistics
Source: BLS This is a fascinating chart from the Bureau Labor Statistics looking at the state-by-state unemployment rates. We know the national jobless rate is down to 6.3 percent and this chart lets us see how that is distributed nationally. At the BLS site, and you can click through the chart and see unemployment…Read More
Source: RealtyTrac via Rampage Yesterday, we directed our ire at bad automobile data. Today, its housing’s turn. I was running through my early morning sites one day last week in preparation for preparing my daily reads posting, when I saw this headline at the Washington Post: “8 in 10 Manhattan home sales are all-cash.”…Read More
This week, an e-mail landed in my inbox with the header “Unsold Cars.” Above is just a few of the thousands upon thousands of unsold cars at Sheerness, United Kingdom. Please do see this on Google Maps….type in Sheerness, United Kingdom. Look to the west coast, below River Thames next to River Medway. Left of…Read More
Source: Know More From Know More: In the graph above, the area of each rectangle corresponds to the size of each country’s economy. The width of the rectangle represents the population, while the height represents the average income in that country. Which rectangle is larger, China’s or that of the United States? According to the…Read More
The Standard & Poor’s 500 Index hit an all-time high yesterday, closing at 1,897.45. The Dow Jones Industrial Average also hit a record, ending at 16,715.44. This should be tempered by noting that the Dow is up less than 1 percent so far this year, while the S&P 500 has gained about 2.7 percent. One…Read More
@TBPInvictus here: On April 17, 2012, North Carolina Congresswoman Virginia Foxx stood before her colleagues in the House of Representatives and said (emphasis mine): Ms. FOXX. Mr. Speaker, the March employment report continues to show us that the Federal Government has not been helping to create jobs in our economy. A Wall Street Journal editorial…Read More