The TI-89 Titanium calculator can efficiently compute the Expected Value of multiple outcomes using the TwoVar() function. This function allows users to input a matrix of outcomes and their corresponding probabilities, significantly simplifying the calculation process. Users can create a user-defined function to handle matrices, enabling quick calculations of expected values without manual summation. The discussion highlights the importance of matrix manipulation for statistical computations on the TI-89 Titanium.
PREREQUISITESThis discussion is beneficial for students, educators, and professionals in statistics or mathematics who utilize the TI-89 Titanium for probability calculations and matrix operations.
Hello everyone! :)
I hope I will get an answer for this!
As a USER-DEFINED function I would like to be able to calculate the Expected Value of n outcomes with their respective probabilities (also in a single matrix)
it should look something like this:
\begin{pmatrix}<br /> <br /> 1 & 1/6 \\<br /> 2 & 1/6 \\<br /> 3 & 1/6 \\<br /> 4 & 1/6 \\<br /> 5 & 1/6 \\<br /> 6 & 1/6 \end{pmatrix}
To find the expected value I would need to do:
(1 \times 1/6) + (2 \times 1/6) + ... + (6 \times 1/6) = E(X)
Basically, multiply each outcome with its probability and finally sum the whole lot...
IDEALLY...I would like to be able to make a single 2 x n matrix with outcomes and probabilities side-by-side, store it as A and be able to do:Code:expval(A)
or...which is faster to type: make a n*2 matrix!
Anyways...sorry for the long post, any help will be much appreciated!