TM 5.6675-316-14
Key strokes
Display
6.0000
Correct y value is entered.
8.
x value is entered again.
3.0000
Number of entries is again
three.
n
(3) Mean. Pressing i
computes the arithmetic mean (average) of x and y values
accumulated in registers R.1 and R.3 respectively.
Pressing
q
E causes the following operations to be performed.
The contents of the stack registers are lifted just as they are when
pressing I@ .
The mean of the x values (!) is calculated using data accumulated in
registers RI ( Z X) and R.O (n).
The resulting value for x appears in displayed X-
register.
The mean of y values (~) is calculated using data accumulated in
registers R.3 ( E y) and R.O (n).
The resulting value for y is available in Y-register of stack.
Example:
Below is a chart of daily high and low temperatures for a winter
week. To find average high and low temperatures for week selected, press
Sun
Mon
Tues
High
6
11
14
Low
-22
-17
-15
Keystrokes
Display
0.0000
22.
1.0000
17.
2.0000
Wed Thurs Fri Sat
12
5
-2
-9
-9
-24
-29 -35
Statistical registers
cleared. (Display shown
assumes no results remain
from previous calculations.)
Number of data pairs (n) is
now 1.
Number of data pairs (n) is
now 2.
15.
6-30
