Sharp EL-738F - Page 71

69
Single-variable statistical calculation
Example Key operation Result
m 1 0 .
b
S a —
000
95
95
J
DATA SET= 100
80
80
J
DATA SET= 200
80
J
DATA SET= 300
75
75
75
75
>
3
J
DATA SET= 400
50
50
J
DATA SET= 500
x
=
f =
–
x
7571
=
σ
x
=
f 2
1237
σ ≈ =
n
=
f
n
700
n=
Σ
x
=
f
U
53000
Í≈=
Σ
x
2
=
f
[
4120000
Í≈Œ=
sx
=
f 4
1336
Sx =
sx
2
=
.
;
=
17857
Sx Œ=
—
×
10 + 50 =
(
95
-
i
=
)
8 i
4
x
10
+
50
=
6443
DATA
1
(95 –
x
)
sx