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HP HP-11C - Page 60

HP HP-11C
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58
Section
3:
Numeric
Functions
Year
1972
1973
1974
1975
1976
Coal
Production
(y)
1.761
(Billions
of
Metric
Tons)
Electricity
Output
(x)
5.5562
(Billions
of
Megawatt
Hours)
1.775
1.792
1.884
1.943
5.963
6.135|
6.313 6.713
Keystrokes
Display
(fJCLEAR
0.0000
1.761
1.7610
5.5652
1.0000
1.775
1.7750
5.963
2.0000
1.792
1.7920
6.135
3.0000
1.884
1.8840
6.313
4.0000
1.943
1.9430
6.713
5.0000
(RCL]1
30.6760
(RCL]2
188.9386
[RCL)3
9.1550
[RCL)4
16.7877
(RcL)5
56.2924
Correcting
Statistics
Accumulations
Clear
statistical
data
storage
registers
(R
through
R;
and
stack).
1972
data
1973
data
1974
data
1975
data
1976
data
Sum
of
x
values
(2x)
from
register
R,.
Sum
of
squares
of
x
values
(3x2)
from
register
Ro.
Sum
of
y
values
(2y)
from
register
Rs.
Sum
of
squares
of
y
values
(2y?)
from
register
R,.
Sum
of
products
of
x
and
y
values
(Zxy)
from
register
Rs.
If
you
discover
that
you
have
entered
data
incorrectly,
the
accumulated
statistics
can
be
easily
corrected.

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