Reversed columns in regression example

by | How to Measure Anything 2ed Errata, News

On page 173 of the 2nd edition of How to Measure Anything, I show a formula for estimating ratings points of a TV show based on the correlation to weeks spent promoting the show.  The formula shown is actually an estimate of promotion weeks based on ratings points instead of an estimate of ratings points based on promotion weeks.  The correct formula should be

Ratings points = 0.215*promotion weeks + 0.877.

The subsequent estimate of ratings points from 10 weeks of promotions should then be about 0.215*10+0.877 or 3 ratings points.

Doug Hubbard

2 Comments

  1. PKBlues
    PKBlues on October 25, 2012 at 8:01 am

    Douglas,

    I found you through a press release for ACORD, and read with interest information about your book, How To Measure Anything. I’m wondering if you’ve ever look at my industry, financial service, and if you might want to contribute an article to an audience of financial planners & advisors. I’m not sure what you might have to say, but in looking at your resume, I see the potential for getting this audience to ‘think outside the box.’ I often go to tangential sources in search of fresh and off-the-beat content.
    In any event, I look forward to reading your book, and I hope you might consider contributing.

    Thanks,

    Peter Kelley, Managing Editor
    LIFE&Health Advisor & L&HA e-newsLink
    http://www.lifehealth.com
    /boston

    • Douglas Hubbard
      Douglas Hubbard on December 12, 2012 at 7:34 am

      Peter,

      Thanks for your interest in my work. Actually, yes, I have at least done training for that kind of audience. And, as you’ve seen, I’ve also consulted for the insurance industry.

      My writing schedule is pretty full but this publication does sound interesting. Feel free to contact me to discuss it.
      Doug Hubbard
      dwhubbard@hubbardresearch.com