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To display this result
xσ
Example: Calculate
given the following data:
In SD mode:
Each time you press
entered is stored. The
indicates the number of data pairs you hove entered.
Standard deviation of the sample
xσ
= 1.407885953
n-1
Standard deviation of the population
xσ
= 1.316956719
n
Mean ( ) = 13.375
x
Number of data points( ) = 8
Sum of the data values (
Sum of the squares of the data values
2
Σx
(
) = 1445
2
Σx
Σx
n
x
xσ
n
n 1
–
xσ
15, 14, 11, 15, 13, 13, 14, 12
(Scl)
(Stat clear)
Press these keys
xσ
,
,
n
n 1
–
15
, the data you have just
= value shown on the screen
n
14
13
n
Σx
) = 107
21
Σx
x
, n,
,
n=
11
14
2
Σx
1.
SD
15
12
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