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math/stat question (OT)

Posted By: Chuck Bower
Date: Saturday, 23 July 2011, at 5:42 p.m.

(Not likely I'm using the 'preferred' symbolism/nomenclature, but I think you'll understand.)

Suppose you take some data and suspect a relationship between x (some independent variable) and P(x) (the probability that something is true, given x). You have several measurements of xi and p(xi) [here I use a small 'p' to distinguish it as a measurement as opposed to the supposed TRUE relationship, which is unknown]. You have several different values {xi for i = 1,2,3...} and the corresponding measurements pi(xi). But for each value of i you have a different number of measurements.

So you find a mean p-bar(xi) for all i and plot them up. Now you want to fit a curve to them ("curve" could be a straight line). How do you weight the different p-bar(xi)?

Messages In This Thread

• math/stat question (OT)
  Chuck Bower -- Saturday, 23 July 2011, at 5:42 p.m.
  • Clarification
    Chuck Bower -- Saturday, 23 July 2011, at 7:15 p.m.
  • math/stat question (OT)
    rambiz -- Saturday, 23 July 2011, at 8:00 p.m.
    • math/stat question (OT)
      Bob Koca -- Saturday, 23 July 2011, at 8:57 p.m.
      • math/stat question (OT)
        rambiz -- Saturday, 23 July 2011, at 9:47 p.m.
        • NOW I understand why you guys are struggling
          Chuck Bower -- Saturday, 23 July 2011, at 10:14 p.m.
          • Siamese or Persian!?
            rambiz -- Sunday, 24 July 2011, at 12:59 a.m.
          • NOW I understand why you guys are struggling
            Casper van der Tak -- Sunday, 24 July 2011, at 8:30 a.m.
          • my solution
            Chuck Bower -- Monday, 25 July 2011, at 3:40 p.m.
        • But for each value of i you have a different number of measurements
          rambiz -- Sunday, 24 July 2011, at 12:45 a.m.