and the arithmetical mean x is defined as
• Pressing
, , , , ,
key need
not be done sequentially.
) .
x
E
Find n, x &
Ó
n 1
-
based on the data : 1.2, - 0.9 , -1.5,
2.7, -0.6, 0.5, 0.5, 0.5, 0.5, 1.3, 1.3, 1.3, 0.8, 0.8, 0.8,
0.8, 0.8.
2.
(1) (Mistake)
-2.5
(1) (To correct)
0.
3.
4.
(2) (Mistake)
5.
(3) ( Mistake)
6.
(3) (To correct)
5.
6.
(2) (To correct)
5.
0.5
9.
∑
x
n
Ó
n-1
Ó
n
∑
X
2
n
x
10. STATISTICAL CALCULATIONS
• Set the function mode to “SD” by pressing
Ex.)Find Ó
n-1
, Ó
n
, x, n,
∑
x and
∑
x
2
based on the
data 55, 54, 51, 55, 53, 53, 54, 52.
8.
(Sample standard deviation)
1.407885953
(Population standard deviation)
1.316956719
(Arithmetical mean)
53.375
(Number of data)
8.
(Sum of value)
427.
(Sum of square value)
22805.
Note : The sample standard deviation Ó
n-1
is defined as
the population standard deviation Ó
n
is defined as
MODE
SD
MODE
DATA
X
➝
M
DATA
DATA
DATA
DATA
RM
DATA
DATA
DATA
SD
INV
Ó
n-1
INV
Ó
n
SD
SD
SD
x
INV
n
55
54
51
55
54
52
53
INV
INV
INV
∑
X
∑
X2
SD
SD
SD
SD
∑
x
2
– (
∑
x )
2
n
n – 1
∑
x
2
– (
∑
x )
2
n
n
∑
X
MODE
DATA
DATA
1
9
•
+/-
•
SD
2
SD
C/CE
DATA
DATA
DATA
2
2
5
7
+/-
+/-
•
•
DATA
1
5
•
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
DATA
INV DEL
INV DEL
6
1
+/-
+/-
•
6
1
+/-
•
6
DATA
4
4
•
x
5
•
DATA
INV DEL
+/-
6
4
•
x
5
•
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- 36 -
