Sharp EL-512 Instruction Manual page 39

Scientific
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[Sy \ :
Used to obtain the standard deviation ( s j) o f the sample of data (y ).
fffy]:
Used to obtain the standard deviation (cry) o f the population o f data
C ha n g © sign a n d s ta tis tic a l c a lc u la tio n k e y
fiyQ :
Changes the sign of the number displayed from a positive to a negative of
vice versa.
[y7] :
When the calculator is set at the statistical calculation mode:
Used to obtain the estimated value of y .
D e c im a l p o i n t a n d D e g r e e /R a d ia n /G r a d s e le c tio n k e y
f* ~ l:
Example
12.3
QD [3D [ZD (3D
0.7
H
SD
(2rtF)§RG):
Used fo r calculation of trigonom etric, inverse trigonom etric and coordi'
nate conversion. The ( 2 n d F | §R§ keys change the angular mode.
>DEG
■>RAD
> G R A D
(Press H
§
r
§ )
Ex. DEG
GRAD: Depress the (arf] |
drg
) keys twice.
"D E G " mode — Entires and answers are in decimal degrees.
" RA D " mode — Entries and answers are in radians.
"G R A D " mode — Entries and answers are in grads. (10Q9 = 90° = — ).
75

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