TM 5-6675-324-14
Keystrokes
Display
3.0000
9.
4.0000
5.0000
-2.0000
6.0000
-9.0000
7.0000
Number of data pairs (n) is
now 7.
-21.5714
Average low temperature.
5.2857
Average high temperature.
(4) Standard deviation.
computes the standard deviation (a measure of dispersion
(a) Pressing
around the mean) of accumulated data.
is pressed:
(b) When
The contents of stack registers are lifted just as 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.0 (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.0 (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
CLEAR ALL
Clear statistical registers
0.0000
and Y-register for new,
one-variable problem.
7-31