Casio FX6300G - Page 68

Statistical Calculations
■Standard deviation
•Standard deviation calculations are performed in the SD1 mode ( g Q ) . “ SD1 ”
appears on the display.
•Before beginning calculations, the statistical memories are cleared by pressing
¡shift) followed by HD and then (g).
•Individual data are input using (d t).
•Multiple data of the same value can be input either by repeatedly pressing (dt)
o r by entering the data, pressing S , followed by C D , that represents the number
o f times the data is repeated, and then (d t).
•Standard Deviation
'LpCi—x )2 _ I E x2-(L x ) 2/n
n \ n
¿(*-3 c )2 = / L x 2-(L x fln
n ~ 1 \ n - 1
•Mean
n
n n
*The values for n, Lx, and Lx2 are stored in memories W, V, and U respectively,
and can be obtained by pressing H followed by the memory name and then dl)
(i.e. (AiMlfwliKE)).
Example
Operation
Display
Data 55, 54, 51, 55, 53, 53,
54, 52
*You can press the functioi
sequence.
(S
I
S Q
(SHiFTlfSdliEXi)
(Clears memory)
55(dt)54(dt)51 (dt)55(dt)
53(1x3(dt)54(dt)52(dt)
n keys to obtain results in any
(Standard deviation on) |SHirT||xow|iixi]
Standard deviation o n -1) |SHIFT||x<^n|fixil
52.
1.316956719
1.407885953
- 6 7 -
Using sample data from a popu
lation to determine the standard
deviation for the population
Using all data from a finite popu
lation to determine the standard
deviation for the population