TM5-6675-326-14
8-6.12.2 Deleting and Correcting Data - Continued
( 4 ) P r e s s X+.
Example:
I f l a s t d a t a p a i r ( 8,
9) in previous example (para
8-6.12.1) should have been (8, 6), correct the accumulation
as follows, press
Keystrokes
Display
9.0000
Incorrect y value is entered
a g a i n.
8.
Correct x value is entered again.
2.0000
Number of entries (n) is now two.
6.0000
8.
Correct y value is entered.
x value is entered again.
3.0000
Number of entries is again three.
8-6.12.3 Mean.
q
Pressing ~ computes the arithmetic mean (average) of x
and y values accumulated in registers R.1 a n d R.3 , respectively.
a .
Pressing
causes the following operations to be
performed:
( 1 ) T h e c o n t e n t s o f t h e s t a c k r e g i s t e r s a r e l i f t e d j u s t as
they are when pressing [=].
(2) The mean of the x values (~) is calculated using data
a c c u m u l a t e d i n r e g i s t e r s R.1 (Zx) and R.0 ( n ) .
The
resulting value for x appears in displayed X-register.
(3) The mean of y values (~) is calculated using data
a c c u m u l a t e d i n r e g i s t e r s R.3 (Zy) a n d R.0 ( n ) .
( 4 ) T h e r e s u l t i n g v a l u e f o r y i s a v a i l a b l e i n Y - r e g i s t e r of
s t a c k.
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
Wed
Thurs
F r i
Sat
High
6
11
14
12
5
-2
-9
Low
- 22
-17
- 15
- 9
- 24
- 29
- 35
8-21
