Casio fx-115W - Manual (Page 21)

E-19
1.047197551 00
840.
210.
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
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.
0 1 Σx 2
0 2 Σx
0
k n
A
M o
A A σ
n
A N σ
n - 1