HP 10s User Manual page 24

Statistics
m Standard Deviation-SD
Press (No to select SD mode for statistical
calculations with standard deviations.
@ In SD and REG modes, the [M+] key acts as the [DT] key.
@ Press the (1) (Scl) EB® keys to erase the
statistics memory before you enter data.
@ Press the following key to input data.
<x data>
@ Inputdata to calculate n,=x, =x", X,xon,
XO n-1.
To display this result Press these keys
Ex? (wr) (7)
=x (surt} (ssw) (2. J
n (wr) (ew) (3)
x ar] (sa) 1)
xOn SHIFT] (SvAR) (2
xO n-71 SHIFT] [S¥AR] (3
@ Example: Calculate xO ni, xOn, X,N, =X,
> x2 given the following data:
163 146 17, 05:, 13), 135, 14. 12
InSD mode:
(sHiF] (cir) (1 ] (Scl) E§ (Stat clear)
15(T}} n= 1.
Each time you press [DT], the data you have just
entered is stored. The n= value shown on the screen
indicates the number of data pairs you have entered.
14 [DT] 11 (BT) 15
13 (BT) (BT) 14 DT) 12 7
Standard deviation of the sample
(x n-1) = 1.407885953 (sar) (5m) 3] ES
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