Casio FX-180PA Manual page 28

Note: The sample standard deviation On-i is defined as
( ~ x)2
n
n-1
the population standard deviation On is defined as
J:x2
(C.l')2
n
n
and the arithmetical mean x is defined as
n
Pressing )E(, ®, EJ, Q, ) 1 or
key need not be done sequentially.
Ex.) Find n, 7 & On - 1 based on the data: 1.2, - 0.9, - 1.5, 2.7,
0.5, 1.3, 1.3, 1.3, 0.8, 0.8, 0.8, 0.8, 0.8.
"SD" ®0102t~09) ~
-0.6, 0.5, 0.5, 0.5,
—0.9
0 (Mistake)
20500
—2.5
'(To correct)
O
0.
1p5p = —1.5
2E7 =
2.7
(
(Mistake)
~
2.7
@, (Mistake) 1Q60 l~ —1.6
s '(To correct)
oEr
— 1.6
0600 ~
—0.6
'(To correct)
207®
2.7
fl 513 0.5
4 l:¢1
0.5
® (Mistake)
10413
1.4
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