StatisticalSD

Calculations REG

Standard Deviation

SD

 

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

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

F2

•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:
AB 1(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 SS54 S52 S

Sample Standard Deviation (σn1) = 1.407885953

AX3=

Population Standard Deviation (σn) = 1.316956719

AX2=
E-22