The number of spruce moths found in traps after 48 hours
was recorded. The traps were placed in different locations in the
tree (top, middle, lower branches, and ground) and different types
of lures were placed in the traps (scent, sugar, chemical). Use
Minitab, R, or your preferred statistical software to
analyze the data shown below.
![[3 pt(s)] If there is no interaction, what is the value of the main factor (Lure) F-statistic? Use the value from the test th](http://img.homeworklib.com/questions/be376130-d650-11ea-ba0a-1f01c8e0fa01.png?x-oss-process=image/resize,w_560)
Homework Answers
Result:
The number of spruce moths found in traps after 48 hours was recorded. The traps were placed in different locations in the tree (top, middle, lower branches, and ground) and different types of lures were placed in the traps (scent, sugar, chemical). Use Minitab, R, or your preferred statistical software to analyze the data shown below.
Interaction F statistic = 0.4127
P value > 0.25
F statistic for Lure: F=0.7274
P value > 0.25
F statistic for Location: F=11.3715
P value ≤ 0.001
Excel Addon Megastat used.
|
Two factor ANOVA |
|||||
|
Factor 2 |
|||||
|
Means: |
|||||
|
scent |
sugar |
chemical |
|||
|
Top |
21.40 |
25.60 |
23.00 |
23.33 |
|
|
Factor 1 |
Middle |
27.80 |
33.40 |
31.80 |
31.00 |
|
Lower |
32.80 |
31.20 |
36.00 |
33.33 |
|
|
Ground |
17.00 |
21.00 |
16.00 |
18.00 |
|
|
24.75 |
27.80 |
26.70 |
26.42 |
||
|
5 |
replications per cell |
||||
|
ANOVA table |
|||||
|
Source |
SS |
df |
MS |
F |
p-value |
|
Factor 1 |
2,237.9167 |
3 |
745.9722 |
11.3715 |
0.0000 |
|
Factor 2 |
95.4333 |
2 |
47.7167 |
0.7274 |
.4884 |
|
Interaction |
162.4333 |
6 |
27.0722 |
0.4127 |
.8670 |
|
Error |
3,148.8000 |
48 |
65.6000 |
||
|
Total |
5,644.5833 |
59 |
|||
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