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(35S) Statistical Distributions Functions
10-26-2015, 09:28 PM
Post: #8
RE: HP 35s Statistical Distributions Functions
For the Chi-squared distribution you just have to calculate a different PDF:

[Image: a107033ede4e5de93c3b7817fc5aeb33.png]

The factor \(\frac{1}{2^{\frac{k}{2}}\Gamma\left(\frac{k}{2}\right)}\) has to be calculated only once as long as the degrees of freedom k doesn't change. This can be done similar to program T.
The value of the distribution has to be calculated in program D. The other programs don't change.

For the F-distribution you have to calculate:

[Image: b8d9434be6497007b94e7ae5f22c34a3.png]

with parameters \(d_1\) and \(d_2\).

To calculate the beta function we can use:

[Image: fcd016ccf3e5aca1621c9b41f077a339.png]

Together with the program for the Student's t-distribution it should be possible to create the missing programs.

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RE: HP 35s Statistical Distributions Functions - Thomas Klemm - 10-26-2015 09:28 PM

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