Sharp EL-9900 - Manual (Page 249)

239
Appendix
Calculation result →Xreg
Calculation result
→Xreg
µ: Mean
σ: Standard
deviation
However: Γ(s) = ∫ ∞
0
x s – 1 e - x dx
2. Error conditions during financial calculations
• r ≤ - 1
• N = 0 in PMT calculations
• I% = 0 and PMT = 0, or I% ≠ 0 and FV = (1/r) (1 + r
×
s)
×
PMT, in N calculations.
s = 1 (Pmt_Begin)
s = 0 (Pmt_End)
In I% calculations
If PMT > 0:
Pmt_End mode: PV ≥ 0 and FV + PMT ≥ 0
PV < 0 and FV + PMT < 0
Pmt_Begin mode: PV + PMT ≥ 0 and FV ≥ 0
PV + PMT < 0 and FV < 0
If PMT < 0:
Pmt_End mode: PV > 0 and FV + PMT > 0
PV
≤ 0 and FV + PMT
≤ 0
Pmt_Begin mode: PV + PMT > 0 and FV > 0
PV + PMT ≤ 0 and FV ≤ 0
If PMT = 0: PV ÷ FV
≥ 0
• FV, N
×
PMT, PV
≥ 0 or FV, N ×
PMT, PV
≤ 0
• Irr calculation: all cash flows have the same sign.
3. Distribution function
1 pdfnorm(
1
f (x) = exp ( – )
(x – µ) 2
2 σ 2
2 π σ
2 pdfT(
f (x) =
πdf df
2
x 2
df
df + 1
2
df + 1
2
-
Γ ( )
Γ ( ) (1 + )