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Statistical calculations, K permutation, K combination – Casio FX-115WA User Manual

Page 20: K standard deviation (sd mode)

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ț18ț

1.047197551

00

840.

θ

0

o

0

n

,

0

o

swaps displayed value with value in

memory.

k Permutation

Example: To determine how many different 4-digit val-

ues can be produced using the numbers 1 through 7

• Numbers cannot be duplicated within the same 4-digit

value (1234 is allowed, but 1123 is not).

7

A

m

4

=

k Combination

Example: To determine how many different 4-member

groups can be organized in a group of 10 individuals

fx-115WA ................ 10

n

4

=

fx-991WA .......... 10

A

n

4

=

Statistical Calculations

k Standard Deviation (SD Mode)

• Press

F

F

1

to enter the SD Mode for statistical

calculations using standard deviation.

• Data input always starts with

A

m

=

to clear statisti-

cal memory.

• Input data is used to calculate values for

n

,

Σx

,

Σx

2

,

o

,

σ

n

and

σ

n

-

1

which you can

recall using the key operations noted
nearby.

210.

0

1 Σx

2

0

2 Σx

0

k

n

A

M o

A

A σ

n

A

N σ

n

-

1

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