« Football and statistics, on HBR! | Main | Optimizely Stats Engine 2: what about advanced users? »

Comments

Feed You can follow this conversation by subscribing to the comment feed for this post.

Dean Abbott

I computed the average of the average fumble rates for all NFL teams for years since 2007 (the year teams began supplying their own footballs, home and away). I know average of averages is a bad idea in general, but I assumed sample sizes each year were close and it was much easier to do it this way! (so it's not a horrible way of approaching it).

The Falcons have a lower fumble rate than the Patriots. The Patriots are #2 and #3 is far away from these two. To your point, rates are lower for dome teams. But nevertheless the Patriots are not unique in being an outlier. Moreover, the Patriots were in the bottom quartile of fumble rates in 2013. They've been the lowest 2x I think since 2007. They have been consistently among the best however (except for 2013).

So while the argument of fumble rates is interesting, it certainly isn't conclusive (unless Atlanta is also found to be deflating footballs--Atlanta is an outlier as well) and as you rightly point out, these are random samples from a large N of teams.

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Working...
Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.

Working...

Post a comment

Your Information

(Name is required. Email address will not be displayed with the comment.)

NEW BOOTCAMP



Link to Principal Analytics Prep

See our curriculum, instructors. Apply.
Business analytics and data visualization expert. Author and Speaker. Founder of Principal Analytics Prep, MS Applied Analytics at Columbia. See my full bio.

Future Courses (New York)

Summer: Statistical Reasoning & Numbersense, Principal Analytics Prep (4 weeks)

Summer: Applied Analytics Frameworks & Methods, Columbia (6 weeks)

Junk Charts Blog



Link to junkcharts

Graphics design by Amanda Lee

Search3

  • only in Big Data

Community