StatisticalSD

CalculationsREG

 

Standard Deviation

SD

 

 

 

Use the F key to enter the SD Mode when you want to perform statistical calculations using standard de- viation.

SD ....................................

F 2(fx-95MS)

 

F F1 (Other Models)

•Always start data input with AB1(Scl) =to clear statistical memory.

•Input data using the key sequence shown below. <x-data> S

•Input data is used to calculate values for n, Σx, Σx2, o, σn and σn-1, which you can recall using the key opera- tions noted nearby.

To recall this type of value:

Perform this key operation:

Σx2

AU1

Σx

AU2

n

AU3

o

AX1

σn

AX2

σn-1

AX3

•Example: To calculate σn1, σn, o, n, Σx, and Σx2 for

the following data : 55, 54, 51, 55, 53, 53, 54, 52

In the SD Mode:

AB1(Scl) = (Stat clear)

55 S

n = SD

1.

Each time you press Sto register your input, the number of data input up to that point is indicated on the display (n value).

54 S51 S55 S

53 S S54 S52 S

Sample Standard Deviation (σn1) = 1.407885953

AX3 =

26