Statistical Calculation Formulas - Sharp EL-501E Operation Manual

Correction after pressing k:
Reenter the data to be corrected and press @ J.
• The number displayed after pressing k or @
J during data entry or correction is the number of
samples (n).
DATA
30
40
40
50
↓
DATA
30
45
45
45
60

Statistical Calculation Formulas

Σx
–
x =
n
sx =
In the statistical calculation formulas, an error will occur
when:
• the absolute value of the intermediate result or calcula-
tion result is equal to or greater than 1 × 10
• the denominator is zero.
• an attempt is made to take the square root of a negative
number.
Fª@Æ
30 k
40 * 2 k
50 k
50 @J
40 * 2 @J
45 * 3 k
60 k
–
Σx
2 – nx 2
n – 1
Σx
σx =
Σx = x + x
1
2 2
Σx = x + x
1
– E-17 –
–
2 – nx 2
n
+ ··· + x
n
2
2
+ ··· + x
2 n
100
.
STAT
0.
1.
3.
4.
3.
1.
4.
5.
2