Solution 12016: Algorithm Used to Compute Chi Squared on the TI-83 Plus and TI-84 Plus Family of Graphing Calculators.
How is Chi Squared computed on the TI-83 Plus and TI-84 Plus family of graphing calculators?
The algorithm used for finding c2 (Chi Squared) of a matrix is as follows:
1) First, an expected matrix is computed based on row and column matrix operations on the observed matrix.
2) Next, the residual is computed based on the difference between the observed matrix and expected matrix.
3) Then, the c2 value is computed based on the residual.
4) Next, the degrees of freedom are computed based on the number of rows and columns.
5) Finally, the probability is computed using the c2 distribution function with the c2 value and degrees of freedom previously computed.
To find the c2 (Chi Squared) of a matrix, please see Solution 34872: Performing Chi-Square Computations on the TI-83 Plus and TI-84 Plus Family of Graphing Calculators.
Please see the TI-83 Plus and TI-84 Plus Family guidebooks for additional information.