Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Probability function with specification for different ranges ?

  1. Apr 28, 2012 #1
    The function fx(x) is defined differently for the range 0 to 1 as for values greater than one to 2.
    Past x = 2, the function is zero.

    When you are asked to find the expected value or variable how are the multiple ranges is all treated ?

    Do you need to add both functions together and calculate the expected value using the two functions ?

    Does the zero mean that the function has converged ? Do all of these probability like equations need to converge to be valid ?
  2. jcsd
  3. Apr 29, 2012 #2

    Stephen Tashi

    User Avatar
    Science Advisor

    Are you saying that you don't know how to do an integration of a function f(x) whose definition involves two different formulae, depending on the range of the variable?

    Yes, you might need to do two integrals and add the integrals together to get the total integral.

    You're just tossing around words without considering whether they mean anything. What do you mean by "the function has converged"? There isn't any question of convergence unless the function is defined as a limit of some sort, where the concept of "convergence" is relevant.

    If a function f(x) is defined by two different formulas on two overlapping intervals, then the formulae must produce the same values on the values on any value of x where the intervals overlap. Is that what you're asking?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook