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(35S) Statistical Distributions Functions
10-29-2015, 07:01 AM
Post: #33
RE: HP 35s Statistical Distributions Functions
(10-29-2015 12:09 AM)PedroLeiva Wrote:  Here is the program for Normal&Inverse-Normal Distributions. Just for those who will be interested in this subject

This is a sample program from the 35s manual. It works, but there is room for improvement. For instance the HP15C Advanced Functions Handbook has a nice 15C program that uses the Integrate function with variable transformation which works much better in the distribution tails.

Personally, I'd prefer a different approach with the classic combination of series expansion and continued fraction to evaluate the Gauss integral. For the inverse, rational approximations with various accuracy levels can be given (yes, there is much more that Hastings' three-digit method as implemented in several HP software pacs). Maybe I will eventually post an example here.

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RE: HP 35s Statistical Distributions Functions - Dieter - 10-29-2015 07:01 AM

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