TM 5-6675-316-14
Keystrokes
Display
3 l 0000
9.
4.0000
24.
5.0000
-2.0000
6.0000
-9.0000
7.0000
Number of data pairs (n) is
now 7.
-21.5714
Average
5.2857
Average
(4) Standard deviation.
(a) Pressing
q
computes the standard deviation (a
around the mean) of accumulated data.
(b) When
q q
is pressed:
The contents of stack registers are lifted just as
low temperature.
high temperature.
measure of dispersion
they are when pressing
The standard deviation of x values (sx ) is calculated using data
accumulated in registers R.2 (2), R.1 (~ ), and R.O (n). The result appears in
displayed X-register.
The standard deviation of y values (sy ) is calculated using data accumu-
lated in registers R.4 (y2), R.3 ( y), and R.O (n). The result appears in Y-
register.
Example:
To determine the standard deviation of the following test scores:
79, 94, 68, 86, 82, 78, 83, and 89, press
Keystrokes
Display
q
CLEAR ALL
0.0000
Clear statistical registers
and Y-register for new,
one-variable problem.
6-31
