Statistical - Cubic Regression (Cubic Spline Fit) ?

[jonmoore]

I took a look through my 48 book collection and found a group of programs that can be used in 48/49/50 series calculators (the book in question is Calculus on the HP-48G/GX - Grapevine Publications). The focus in the book is on calculating integrals, but the techniques/programs can be used for more general statistical curve fitting workflows too.

It's available in digital form via:
https://literature.hpcalc.org/items/1500

But here's so examples from the book.