Texas Instruments BA II PLUS - Manual (Page 95)

Appendix — Reference Information 91
Standard deviation with n -1 weighting (s
x
):
Mean:
Regressions
Formulas apply to all regression models using transformed data.
Interest Rate Conversions
where: x =.01 Q NOM P C ˆ Y
where: x =.01 Q EFF
Percent Change
1 2
⁄
x 2
x
∑
⎝ ⎠
⎛ ⎞ 2
n
-------------------- –
∑
n 1 –
-----------------------------------------
x
x
)
∑
(
n
--------------- =
b
n xy
)
∑
(
y
∑
( )
x
∑
( )
–
n x
2
∑
( )
x
∑
( ) 2
–
--------------------------------------------------------- =
a
y
∑
b x
∑
–
( )
n
--------------------------------- =
r
b
δ
x
δ
y
-------- =
EFF 100 e C Y
⁄
In
×
x 1
ч ( ) (
1
)
–
Ч
=
NOM 100 C Y
⁄
e 1 C Y In
Ч ⁄ ч (
x 1 +
( )
1
)
–
Ч Ч
=
NEW OLD 1
%CH
100
-------------- +
⎝ ⎠
⎛ ⎞ #PD
=