which interactions to explore between sex, age, height to predict weight

by Aviad Rozenhek   Last Updated October 19, 2019 20:19 PM

As a learning exercise I'm running linear regression to predict person's weight from: sex, age, height. here's a few sample lines

    Sex Age Height  Weight
860 0   50  162.8   58.1
202 1   34  182.3   89.4
580 0   46  171.5   59.9
762 0   40  167.3   55.9
390 1   50  164.8   69.4

having examined the outcome it looks like age is contributing +/- 0.3KG which is very minor. I'm wondering if there is more useful information to be gleaned from age?

  1. I've considered adding interaction variables like sexage or ageheight. should I try other interactions?
  2. I've considered running PCA. would this just rotate my vectors and achieve nothing, or would it add anything?
  3. any other suggestion to try

much obliged



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