HP 48G Linear Regression Best Fit Line

[Rodger Rosenbaum]

(12-22-2021 09:28 PM)MNH Wrote:  

(12-21-2021 08:42 AM)Rodger Rosenbaum Wrote:  After you do the "Fit data" in the statistics menu, there are 3 items on the stack--just drop them.

Why is it necessary to do this at all then?

As I explained in post #27:

"After you enter the data into ΣDAT you need to get into the statistics menu and execute the "Fit data" function (it's the 3rd function in the list). Doing this will fill in all the summary statistics such as ΣX, ΣY, ΣXY, etc. Without doing this the LR function, and the ORTH program won't work.
"

Actually, I checked and just executing LR will fill in the summary statistics, and you will only have 2 things to delete. :-)

But it's still true that ORTH needs the summary statistics filled in order to work properly.