User's Guide

55
• Input data is used to calculate values for n , Σ x , Σ x
2
, x
-
, σ
n
and s
x
,
which you can recall using the key operations noted nearby.
To recall this type of value: Perform this key operation:
Σ x
2
(S-SUM) (Σ x
2
)
Σ x (S-SUM) (Σ x )
n (S-SUM) (n )
x
-
(S-VAR) ( x
-
)
σ
x
(S-VAR) ( σ
x
)
s
x
(S-VAR) (s
x
)
Example: To calculate s
x
, σ
x
, x
-
, n , Σ x , and Σ x
2
for the following data :
55, 54, 51, 55, 53, 53, 54, 52
In the SD Mode:
(CLR) (Scl) (Stat clear)
Each time you press to register your input, the number of data input up
to that point is indicated on the display ( n value).
54 51 55 53 54 52
Sample Standard Deviation (s
x
) = 1.407885953
(S-VAR) (s
x
)
1.407885953
Population Standard Deviation ( σ
x
) = 1.316956719
(S-VAR) ( σ
x
)
1.316956719
Arithmetic Mean (
x
-
) = 53.375
(S-VAR) ( x
-
)
53.375
Number of Data ( n ) = 8
(S-SUM) ( n )
8.
Sum of Values (Σ x ) = 427
(S-SUM) (Σ x )
427.
44