The table below shows the stem density (number of stems per m2 ) of seven plots before and after treatment for an invasive plant called European common reed (Phragmites australis). Do the data suggest that the treatment is effective in reducing stem density? Note that row Diff represents Before minus After. a. What statistical test is most appropriate to answer this question? b. Write an appropriate null and alternative hypothesis for this question. c. What are the values for the T+ and the T-? d. Assuming a 5% significance level, what is the appropriate decision for this test and why? e. Write a one-sentence conclusion statement.
The table below shows the stem density (number of stems per m2 ) of seven plots before and after treatment for an invasive plant called European common reed (Phragmites australis). Do the data suggest that the treatment is effective in reducing stem density? Note that row Diff represents Before minus After. a. What statistical test is most appropriate to answer this question? b. Write an appropriate null and alternative hypothesis for this question. c. What are the values for the T+ and the T-? d. Assuming a 5% significance level, what is the appropriate decision for this test and why? e. Write a one-sentence conclusion statement.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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The table below shows the stem density (number of stems per m2 ) of seven plots before and after treatment for an invasive plant called European common reed (Phragmites australis). Do the data suggest that the treatment is effective in reducing stem density? Note that row Diff represents Before minus After.
a. What statistical test is most appropriate to answer this question?
b. Write an appropriate null and alternative hypothesis for this question.
c. What are the values for the T+ and the T-?
d. Assuming a 5% significance level, what is the appropriate decision for this test and why?
e. Write a one-sentence conclusion statement.
Transcribed Image Text:Plot
Before
After
Diff
A
176
169
7
B
160
151
9
с
180
178
2
D
187
192
-5
data: stems $Before and stems $After
V = 23.5, p-value = 0.06375
E
172
158
14
F
172
174
-2
The appropriate test was performed in R. The results are shown below:
G
159
147
12
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