Citizen SR-135T User Manual page 9

e. (R P Conversion)
([x, y] [r, θ ])
Key operation
x
a
y
b
R P
b
(23) Statistical calculation mode ([SHIFT]
a. When you calculate the calculation of statistics, pressing
[SHIFT]
[
ON/C
you clear to statistics mode, press the same keys ([SHIFT]
SD
).
[ ]
ON/C
b. You can't perform the memory calculation, parenthesis
calculation or conversion of coordinates.
c. [DATA] : Data entry 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
4. x : Average of datum.
5. σ
n–1
6. σ
n
σ
−
n
σ
n
SR8D1A-E.RTF SIZE : 140x75mm
Display Key operation
x
x
y
y
r
θ
SD
keys for statistics mode ("SD" sign ). When
]
2
: Total of square of each data.
: The sample standard deviation of the data.
: The population standard deviation of the data.
n
Σ
Xi
=
i 1
=
x
n
n
2
( Xi − x )
Σ
=
i 1
=
1
n − 1
n
2
−
( Xi x )
Σ
=
i 1
=
n
-
E9 -
f. (P R Conversion)
([r, θ ] [x, y])
Display
θ
b
r
a
P R
b
SD
).
[ ]
ON/C
[DEL] : Data clear key.
Σ
x
=
n
2
Σ
( x )
2
Σ −
x
n
=
n − 1
2
Σ
( x )
2
Σ −
x
n
=
n
SCALE 2:1 2003/8/22
θ
θ
r
r
x
y