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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, σn and σn-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 σn
A N σn-1