• Posts
  • RSS
  • ◂◂RSS
  • Contact

  • Standard Deviation

    September 1st, 2011
    math
    Standard deviation is the average distance between each data point and the mean of the data. It's defined as:

    Why isn't it:

    That is, why is it the square root of the average of (x-mu)^2 instead of just the average of |x-mu|? How is the squared version more useful?

    Update 2011-09-01 I had left out the square root on the standard deviation.

    Comment via: google plus, facebook

    Recent posts on blogs I like:

    Rereading Roald Dahl

    Taking out a few words doesn't change much. The post Rereading Roald Dahl appeared first on Otherwise.

    via Otherwise March 25, 2023

    What does Bing Chat tell us about AI risk?

    Early signs of catastrophic risk? Yes and no.

    via Cold Takes February 28, 2023

    Why Neighborhoods Should Have Speed Bumps

    I have several reasons I think why neighborhoods should have speed bumps. First, speed bumps are very useful to stop cars from hitting people in the streets. Second, when construction workers installed speed bumps on the street in front of our house it was v…

    via Lily Wise's Blog Posts February 27, 2023

    more     (via openring)


  • Posts
  • RSS
  • ◂◂RSS
  • Contact