Section 4: Statistics Functions
51
X
NITROGEN APPLIED
0.00
20.00 40.00 60.00 80.00
(kg per hectare *), x
Y
GRAIN YIELD
4.63
4.78
6.61
7.21
7.78
(metric tons per
hectare),
y
*A hectare equals 2.47 acres.
Keystrokes
Display
´
CLEAR
∑
0.0000
Clears statistical storage
registers (R
2
through R
7
and
the stack).
´
•
2
0.00
Limits display to two decimal
places, like the data.
4.63
v
4.63
0
z
1.00
First data point.
4.78
v
4.78
20
z
2.00
Second data point.
6.61
v
6.16
40
z
3.00
Third data point.
7.21
v
7.21
60
z
4.00
Fourth data point.
7.78
v
7.78
80
z
5.00
Fifth data point.
l
3
200.00
Sum of
x
-values,
Σ
x
(kg of
nitrogen).
l
4
12.000.00
Sum of squares of
x
-values,
Σ
x
2
.
l
5
31.01
Sum of
y
-values,
Σ
y
(grain
yield).
l
6
200.49
Sum of squares of
y
-values,
Σ
y
2
.
l
7
1,415.00
Sum of products of
x
- and
y-
values,
Σ
xy
.
Summary of Contents for HP-15C
Page 1: ...HP 15C Owner s Handbook HP Part Number 00015 90001 Edition 2 4 Sep 2011 ...
Page 17: ...Part l HP 15C Fundamentals ...
Page 64: ......
Page 65: ...Part ll HP 15C Programming ...
Page 118: ...118 ...
