Casio FX-260SOLAR User Manual
Page 33
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n
!
(n
Ҁr)!
n
!
n
!(n
Ҁr)!
Permutation
• Input range: n
ͧ r ͧ 0 (n, r : integers)
• Formula: nPr
҃
Combination
• Input range: n
ͧ r ͧ 0 (n, r : integers)
• Formula: nCr
҃
Population Standard Deviation
n
҃
n
⌺
i
҃ 1
n
(xi – x)
2
҃
n
⌺x
2
– (
⌺x)
2
/
n
Sample Standard Deviation
n
–
1
҃
n
– 1
⌺
i
҃ 1
n
(xi – x)
2
҃ ⌺
x
2
– (
⌺x)
2
/
n
n
– 1
Arithmetic Mean
o
҃
n
⌺
i
҃ 1
n
xi
҃ ⌺
x
n
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