Question: You are testing five fertilizers on the U.T. experimental farm plots along the Tennessee River off of Alcoa Highway. Three of these-TNT, DUH, & PHD-are synthetic nitrogen enhancers. Two-POO & ZOO-are natural fertilizers. You have 48 equal sized plots with equal pre-tested soil nutrients & organics, & plant corn in each plot, using each of the fertilizers on six plots, & retaining six plots for a control group. At harvest, you measure how many pounds of corn you have produced from each plot:
[A] Find the independent variable?
[B] Find the dependent variable?
[C] What is/are the appropriate tests to use for this study?
[D] Are contrasts or post hoc analyses indicated? Why?
[E] Perform the appropriate analysis/analyses & state your conclusions.
|
POO
|
ZOO
|
TNT
|
DUH
|
PHD
|
Control
|
|
76
|
87
|
65
|
83
|
68
|
62
|
|
90
|
90
|
80
|
62
|
74
|
57
|
|
79
|
94
|
68
|
74
|
75
|
62
|
|
83
|
89
|
81
|
77
|
75
|
65
|
|
85
|
87
|
89
|
65
|
80
|
52
|
|
84
|
86
|
77
|
59
|
68
|
49
|
|
88
|
87
|
75
|
71
|
76
|
60
|