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SR135_English_090326.rtf SIZE : 140x75mm SCALE 2:1
2009/3/26
-
E9 -
e. (R
→
P Conversion)
([x, y]
→
[r,
θ
])
f. (P
→
R Conversion)
([r,
θ
]
→
[x, y])
Key operation Display Key operation Display
x x
θ
θ
a x b
θ
y y r r
b y a r
R
→
P
r
P
→
R
x
b
θ
b y
(23) Statistical calculation mode ([SHIFT]
[]
ON/C
SD
).
a. When you calculate the calculation of statistics, pressing
[SHIFT]
[]
ON/C
SD
keys for statistics mode ("SD" sign ). When
you clear to statistics mode, press the same keys ([SHIFT]
[]
ON/C
SD
).
b. You can't perform the memory calculation, parenthesis
calculation or conversion of coordinates.
c. [DATA] : Data entry key. [DEL] : Data clear key.
d. you can calculate the following statistical volume in this
calculator.
1. n : Number of data (Number of sample).
2.
Σ
x : Total of datum.
3.
Σ
x
2
: Total of square of each data.
4.
x
: Average of datum.
5.
σ
n–1: The sample standard deviation of the data.
6.
σ
n : The population standard deviation of the data.
n
x
n
xi
x
n
i
Σ
==
∑
=1
1
/)(
1
)(
22
1
2
1
−
Σ−Σ
=
−
−
=
∑
=
−
n
nxx
n
xxi
n
i
n
σ
n
nxx
n
xxi
n
i
n
/)(
)(
22
1
2
Σ−Σ
=
−
=
∑
=
σ