HP 15c - Manual (Page 206)

206 Appendix A: Error Conditions
 x or y is noninteger;
 x < 0 or y < 0;
 x > y;
 x or y ≥ 10
10
.
Error 1: Improper Matrix Operation
Applying an operation other than a matrix operation to a matrix, that is,
attempting a nonmatrix operation while a matrix is in the relevant register
(whether the X- or Y-register or a storage register).
Error 2: Improper Statistics Operation
’ n = 0
S n ≤ 1
j n ≤ 1
L n ≤ 1
Error 2 is also displayed if division by zero or the square root of a negative
number would be required during computation with any of the following
formulas:
n
x
x


n
y
y


1) (


n n
M
x
s
1) (


n n
N
y
s
N M
P
r


M
P
A

M n
x P y M
B

  

 
M n
x x n P y M
y

    
 ˆ
where:
M = nΣx
2
– (Σx)
2
N = nΣy
2
– (Σy)
2
P = nΣxy – ΣxΣy
(A and B are the values returned by the operation
L, where y= Ax + B.)