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Using the CAS calculator in Math Class, we've been using the Stat List Editor Program to find a line of regressions (y=a+bx). One of the calculators will not produce an answer, citing a domain error before the steps can be fully carried out. We've had a number of students and teachers look over the calculator and attempt to find its error, so far no one has fixed it. We need a solution quickly, as with a test coming up it is imperative that the calculator is working properly.

The Steps are as follows, in case it helps:

Apps -> Stat List Editor -> Fill values for List 1 and List 2 -> F4: Calc -> 3 Regressions -> 1 (whatever that one is).

We fill the variables as follows: x = List 1 and y = List 2, we press enter and we are given the values for a, b, r and r^2 when y=a+bx and r is the correlation coefficient. The calculator with issues presents the domain error instead of these values.

We've tried minor troubleshooting: clearing Y=, New Problem, Clearing a and b, reseting the stat list, uninstalling and reinstalling the stat list and stuff like that, but we haven't been able to fix it. The teachers seem to have not come across this error before.

We'd love any help you can offer, but I don't actually have the calculator with me (it's not mine) so I won't be able to try out any solutions in real-time. Thanks in advance.

It worked fine for me. There may be some obscure setting set on the calculator that is producing the error - try resetting them to the defaults (all applications and programs won't be lost) by pressing 2ND, then 6, F1, right arrow, then 2. Or, if that doesn't work, try resetting the RAM completely ( 2ND, 6, F1, right arrow, ENTER - applications are archived programs won't be lost).