2.5 STATISTICAL CALCULATIONS
2.5.1 Standard deviation
●
Standard deviation calculations are performed in the SD mode (
). “SD” appears on
the display.
●
Before beginning calculations, the statistical memories are cleared by pressing
followed by
and then .
●
Individual data are input using .
●
Multiple data of the same value can be input either by repeatedly pressing
or by entering
the data, pressing
, followed by
, that presents the number of times the data is
repeated, and then .
●
Standard Deviation
●
Mean
*** The values for n,
Σ
x, and
Σ
x2 are stored in memories W, V, and U respectively and can be obtained by
pressing
followed by the memory name and then
(i.e.
).
- 32 -
Copyright L
EXIBOOK
2002
GB
120
1101
1010 A
7
5
3
2A
5D
1234
2FFFED
Hex
EXE
Hex
EXE
EXE
EXE
Bin
or
SHIFT
b
and
SHIFT
h
or
EXE
Not
EXE
Not
EXE
Scl
DT
DT
DT
SHIFT
h
EXE
SHIFT
xnor
Hex
EXE
Oct
EXE
Hex
EXE
EXE
SHIFT
xnor
EXE
120
16
OR 110
12
= ? hexadecimal
1010
2
AND (A
16
OR
7
16
)
= ? binary
5
16
XOR 3
16
= ? hexadecimal
2A
16
XNOR 5D
16
= ? hexadecimal
Negation of 1234
8
Negation of 2FFFED
16
BASE-N
h
h
12D
BASE-N
b
b
1010
BASE-N
h
h
6
BASE-N
h
h
FFFFFF88
BASE-N
o
o
7777776543
BASE-N
h
h
FFD00012
(
)
x
MODE
W
EXE
EXE
ALPHA
ALPHA
SHIFT
SHIFT
;
Using all data from a finite
population to determine the
standard deviation for the population
Using sample data from a population
to determine the standard deviation
for the population
σ
n=
n n
n-1 n-1
σ
n-1=