Chapter 9 : The effect of light on Meadowfoam flowering
Raw data Listing
Obs
FLOWERS
TIME
INTENSity
Time0
TimeName
1
62.3000
1
150
0
Late
2
77.4000
1
150
0
Late
3
55.3000
1
300
0
Late
4
54.2000
1
300
0
Late
5
49.6000
1
450
0
Late
6
61.9000
1
450
0
Late
7
39.4000
1
600
0
Late
8
45.7000
1
600
0
Late
9
31.3000
1
750
0
Late
10
44.9000
1
750
0
Late
11
36.8000
1
900
0
Late
12
41.9000
1
900
0
Late
13
77.8000
2
150
1
Early
14
75.6000
2
150
1
Early
15
69.1000
2
300
1
Early
16
78.0000
2
300
1
Early
17
57.0000
2
450
1
Early
18
71.1000
2
450
1
Early
19
62.9000
2
600
1
Early
20
52.2000
2
600
1
Early
21
60.3000
2
750
1
Early
22
45.6000
2
750
1
Early
23
52.6000
2
900
1
Early
24
44.4000
2
900
1
Early
Chapter 9 : The effect of light on Meadowfoam flowering
Plot of the raw data
Plot of FLOWERS*INTENSity. Symbol is value of TimeName.
FLOWERS |
|
80 +
| E E
| L
| E
|
| E
70 +
| E
|
|
| E
| L L
60 + E
|
| E
| L
| E
| E
50 + L
|
|
| L L E
|
| L
40 + L
|
| L
|
|
| L
30 +
|
---+----------------+----------------+----------------+----------------+----------------+--
150 300 450 600 750 900
INTENSity
NOTE: 2 obs hidden.
Chapter 9 : The effect of light on Meadowfoam flowering
Initial fit of the raw data to TIME
The REG Procedure
Model: MODEL1
Dependent Variable: FLOWERS
Number of Observations Read
24
Number of Observations Used
24
Analysis of Variance
Source
DF
Sum of Squares
Mean Square
F Value
Pr > F
Model
1
886.95034
886.95034
5.65
0.0265
Error
22
3450.98592
156.86300
Corrected Total
23
4337.93627
Root MSE
12.52450
R-Square
0.2045
Dependent Mean
56.13750
Adj R-Sq
0.1683
Coeff Var
22.31039
Parameter Estimates
Variable
DF
Parameter Estimate
Standard Error
t Value
Pr > |t|
Intercept
1
37.90000
8.08453
4.69
0.0001
TIME
1
12.15833
5.11310
2.38
0.0265
Chapter 9 : The effect of light on Meadowfoam flowering
Initial fit of the raw data to INTENSITY
The REG Procedure
Model: MODEL1
Dependent Variable: FLOWERS
Number of Observations Read
24
Number of Observations Used
24
Analysis of Variance
Source
DF
Sum of Squares
Mean Square
F Value
Pr > F
Model
1
2579.75004
2579.75004
32.28
<.0001
Error
22
1758.18622
79.91756
Corrected Total
23
4337.93627
Root MSE
8.93966
R-Square
0.5947
Dependent Mean
56.13750
Adj R-Sq
0.5763
Coeff Var
15.92458
Parameter Estimates
Variable
DF
Parameter Estimate
Standard Error
t Value
Pr > |t|
Intercept
1
77.38500
4.16119
18.60
<.0001
INTENSity
1
-0.04047
0.00712
-5.68
<.0001
Chapter 9 : The effect of light on Meadowfoam flowering
Plot of the raw data
Plot of resid*INTENSity. Symbol is value of TimeName.
resid |
|
15 +
|
| E E
| E E
|
10 + E
|
|
|
| L
5 +
| E E
| L E
|
| L
0 +
| E E
| E L
|
| L
-5 +
|
| L
|
| L
-10 + L L
| L
|
|
| L
-15 +
| L
|
|
|
-20 +
|
---+----------------+----------------+----------------+----------------+----------------+--
150 300 450 600 750 900
INTENSity
NOTE: 1 obs hidden.
Chapter 9 : The effect of light on Meadowfoam flowering
Multiple regression
The REG Procedure
Model: MODEL1
Dependent Variable: FLOWERS
Number of Observations Read
24
Number of Observations Used
24
Analysis of Variance
Source
DF
Sum of Squares
Mean Square
F Value
Pr > F
Model
2
3466.70039
1733.35019
41.78
<.0001
Error
21
871.23588
41.48742
Corrected Total
23
4337.93627
Root MSE
6.44107
R-Square
0.7992
Dependent Mean
56.13750
Adj R-Sq
0.7800
Coeff Var
11.47374
Parameter Estimates
Variable
DF
Parameter Estimate
Standard Error
t Value
Pr > |t|
Intercept
1
59.14750
4.95447
11.94
<.0001
INTENSity
1
-0.04047
0.00513
-7.89
<.0001
TIME
1
12.15833
2.62956
4.62
0.0001
Chapter 9 : The effect of light on Meadowfoam flowering
Multiple regression
Plot of residuals
Plot of resid*INTENSity. Symbol is value of TimeName.
resid |
15 +
|
|
| L
|
|
10 +
| L
|
| E
| E L
| E E
5 +
| L
| E
|
| L
|
0 +--E---------------------------------------------------------------------------------------
|
| E L
| E E
| L L
| L
-5 + L
|
| E
| L E
| E
|
-10 + L
|
---+----------------+----------------+----------------+----------------+----------------+--
150 300 450 600 750 900
INTENSity
Chapter 9 : The effect of light on Meadowfoam flowering