+- HP Forums (https://www.hpmuseum.org/forum)
+-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html)
+--- Forum: General Forum (/forum-4.html)
+--- Thread: HP-67 & Normal Distribution Integral (/thread-19224.html)
HP-67 & Normal Distribution Integral - Matt Agajanian - 11-28-2022 09:57 PM
Hi all.
Yeah. I know. At the time, Normal Distribution and Inverse ND was calculated using constants.
Since the 67 had 224 steps, why wasn’t it possible for the 67, to have a Trapezoidal or Simpson’s routine program with the ND function as the subroutine?
RE: HP-67 & Normal Distribution Integral - rawi - 11-29-2022 08:08 AM
I do not think that this is a problem in principle. In the HP 67/97 Math Pac listing there is as well a program for numerical integration. I think that it is a matter of time and convenience. If the approximation is exact to E-4 this is totally sufficient and it is much faster than numeric integration with the same accuracy.
RE: HP-67 & Normal Distribution Integral - Matt Agajanian - 11-29-2022 08:46 PM
(11-29-2022 08:08 AM)rawi Wrote: I do not think that this is a problem in principle. In the HP 67/97 Math Pac listing there is as well a program for numerical integration. I think that it is a matter of time and convenience. If the approximation is exact to E-4 this is totally sufficient and it is much faster than numeric integration with the same accuracy.
Good point.