Tasks

Finding the Inverse Image of a Function

Instructions
Quick theory overview:

For a function \(\mathcal{f}\) that maps outcomes \(\omega\) from a sample space \(\Omega\) to the real numbers, the inverse image of a set \(B\) is the collection of all outcomes that map into \(B\). We are interested in sets of the form \(B = (-\infty, c]\). Therefore, the inverse image is:

\(f^{-1}(-\infty, c]) = \{ \omega_i \in \Omega \mid f(\omega_i) \leq c\}\)

Procedure:

  • Enter a value for the constant 'c' in the input box.
  • Press the "Generate Function Values" button. This will create a new random function \(\mathcal{f}\) and display its output values.
  • The plot will visualize the function values and show the threshold 'c' as a horizontal line.
  • Based on the definition, determine which outcomes \(\{\omega_1, \omega_2, \omega_3, \omega_4\}\) have function values less than or equal to 'c'.
  • Select the correct set from the grid of possible answers.
  • The "Observations" panel will provide immediate feedback on your selection.

\(f(\omega_1)\) = ?
\(f(\omega_2)\) = ?
\(f(\omega_3)\) = ?
\(f(\omega_4)\) = ?

3. Select the correct inverse image set:

Observations

Enter a value for 'c' and generate the function.