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Appendix D: Formulas Used 191
File name: hp 12c_user's guide_English_HDPMBF12E44 Page: 191 of 209
Printered Date: 2005/7/29 Dimension: 14.8 cm x 21 cm
Interest Rate Conversions
C = number of compounding periods per year.
EFF = the effective annual interest rate as a decimal.
NOM = the nominal annual interest rate as a decimal.
Finite Compounding
11 −
⎟
⎠
⎞
⎜
⎝
⎛
+=
C
C
NOM
EFF
Continuous Compounding
)1( −=
NOM
eEFF
Statistics
Mean
n
x
x
∑
=
n
y
y
∑
=
Weighted Mean
∑
∑
=
w
w
x
x
w
Linear Estimation
n = number of data pairs
B
x
A
y
+
=
ˆ
B
A
y
x
−
=
ˆ
where
()
n
x
x
n
yx
xy
B
2
2
∑
∑
∑
∑
∑
−
⋅
−
=
x
B
y
A
−
=