Casio FX-115W User Manual
E-20
• Example: To calculate
σ
n
1
,
σ
n
,
o, n, Σx, and Σx
2
for the
following data : 55, 54, 51, 55, 53, 53, 54, 52
Enter SD Mode
F
F
1
A
m
=
(Memory Clear)
55
S
54
S
51
S
55
S
53
S
S
54
S
52
S
(Sample Standard Deviation
σ
n
1
)
A
N
=
(Population Standard Deviation
σ
n
)
A
A
=
(Arithmetic Mean
o
)
A
M
=
(Number of Data
n
)
0
k
(Sum of Values
Σx
)
0
H
(Sum of Squares of Values
Σx
2
)
0
G
Data Input Precautions
•
S
S
inputs the same data twice.
• You can also input multiple entries of the same data us-
ing
A
G
. To input the data 110 ten times, for example,
press 110
A
G
10
S
.
• The above results can be obtained in any order, and not
necessarily that shown above.
• To delete data you have just input, press
A
U
.
k Probability Distribution Calculations
• Press
A
D
to produce the screen shown below.
• Input a value from
1
to
4
to select the probability
distribution calculation you want to perform.
52.
00
SD
1.407885953
00
1.316956719
00
53.375
00
8.
00
22805.
00
427.
00
1 2 3 4
P
(
Q
(
R
(
→ t
P(t)
R(t)
Q(t)