Region Blight Plains Armillaria Plains Armillaria Plains Scleroderris Plains Diplodia Mountains None Mountains None Mountains Armillaria...
Region Blight
Plains Armillaria
Plains Armillaria
Plains Scleroderris
Plains Diplodia
Mountains None
Mountains None
Mountains Armillaria
Mountains Diplodia
Mountains Diplodia
Mountains Scleroderris
Mountains Scleroderris
Mountains None
Forest Diplodia
Forest None
Forest Armillaria
Forest Armillaria
Forest Armillaria
Plains Armillaria
Plains None
Mountains Scleroderris
Mountains Diplodia
Forest None
Mountains None
Mountains Scleroderris
Forest Armillaria
Plains Armillaria
Forest Armillaria
Forest None
Mountains Diplodia
Forest Diplodia
Plains Scleroderris
Plains Scleroderris
Plains None
Forest Armillaria
Forest None
Mountains None
Mountains None
Forest Scleroderris
Plains Scleroderris
Forest Diplodia
Plains Diplodia
Plains None
Forest Armillaria
Forest Armillaria
Mountains Armillaria
Mountains Scleroderris
Plains Diplodia
Mountains None
Forest Scleroderris
Forest Scleroderris
Forest Armillaria
Plains None
Plains None
Plains Diplodia
Plains Armillaria
Plains Armillaria
Mountains None
Mountains Scleroderris
Mountains None
Forest Diplodia
Forest Diplodia
Forest Armillaria
Plains Armillaria
Plains Scleroderris
Plains Scleroderris
Forest None
Forest None
Mountains Diplodia
Mountains Diplodia
Forest Diplodia
Plains None
Mountains Armillaria
Mountains Armillaria
Plains Armillaria
Forest Scleroderris
Mountains None
Forest Scleroderris
Mountains Diplodia
Mountains Diplodia
Mountains None
Plains None
Plains Armillaria
Plains Armillaria
Plains Diplodia
Plains Scleroderris
Plains Diplodia
Mountains Diplodia
Mountains None
Mountains Scleroderris
Forest Scleroderris
Forest Armillaria
Forest None
Plains Armillaria
Plains Diplodia
Plains Armillaria
Mountains None
Forest Scleroderris
Mountains Diplodia
Forest None
Plains Armillaria
Forest Armillaria
Mountains Armillaria
Plains Scleroderris
Plains None
Forest Scleroderris
Mountains None
Mountains Diplodia
Mountains Diplodia
Forest Diplodia
Plains Armillaria
Plains Armillaria
Plains None
Forest Scleroderris
Plains Scleroderris
Mountains None
Mountains Diplodia
Forest None
Forest Diplodia
Plains Scleroderris
Plains Armillaria
Plains Armillaria
Mountains Armillaria
Forest None
Plains Scleroderris
Mountains Diplodia
Plains Diplodia
Forest None
Plains Scleroderris
Mountains Scleroderris
Forest Armillaria
Mountains Armillaria
Plains Diplodia
Plains Diplodia
Plains None
Plains Scleroderris
Plains Armillaria
Plains Armillaria
Plains Diplodia
Plains None
Plains Armillaria
Plains Armillaria
Plains Scleroderris
Plains None
Forest Diplodia
Included are the data for one-hundred and forty-four trees,
which includes from which
region in the Northwestern United States they come, and which (if
any) blight they have.
Using SPSS, perform a Chi-Squared test for the hypothesis that
there is an association
between the region from which a tree comes and which blight it has
with a significance
level of .05. Which region has the highest proportion of the blight
Diplodia? Please
include the Two-Way table produced, the results of the test, and
any bar charts that you
like.
Please, in a written analysis, explain your conclusion to the
test and give your answer to the question.
Homework Answers
Result:
Included are the data for
one-hundred and forty-four trees, which includes from
which
region in the Northwestern United States they come, and which (if
any) blight they have.
Using SPSS, perform a Chi-Squared test for the hypothesis that
there is an association
between the region from which a tree comes and which blight it has
with a significance
level of .05. Which region has the highest proportion of the blight
Diplodia? Please
include the Two-Way table produced, the results of the test, and
any bar charts that you
like.
Ho: there is no association between the region and blight .
H1: there is an association between the region and blight .
Calculated chi square value 7.735, P=0.258 which is > 0.05 level of significance. Ho is not rejected. We conclude that there is no association between the region and blight .
Mountains region has the highest proportion (41.2%) of the blight Diplodia.
SPSS command:
CROSSTABS
/TABLES=Region BY Blight
/FORMAT=AVALUE TABLES
/STATISTICS=CHISQ
/CELLS=COUNT COLUMN
/COUNT ROUND CELL
/BARCHART.
SPSS output:
|
Region * Blight Crosstabulation |
|||||||
|
Blight |
Total |
||||||
|
Armillaria |
Diplodia |
None |
Scleroderris |
||||
|
Region |
Forest |
Count |
13 |
9 |
11 |
9 |
42 |
|
% within Blight |
31.7% |
26.5% |
28.9% |
29.0% |
29.2% |
||
|
Mountains |
Count |
7 |
14 |
15 |
8 |
44 |
|
|
% within Blight |
17.1% |
41.2% |
39.5% |
25.8% |
30.6% |
||
|
Plains |
Count |
21 |
11 |
12 |
14 |
58 |
|
|
% within Blight |
51.2% |
32.4% |
31.6% |
45.2% |
40.3% |
||
|
Total |
Count |
41 |
34 |
38 |
31 |
144 |
|
|
% within Blight |
100.0% |
100.0% |
100.0% |
100.0% |
100.0% |
|
Chi-Square Tests |
|||
|
Value |
df |
Asymptotic Significance (2-sided) |
|
|
Pearson Chi-Square |
7.735a |
6 |
0.258 |
|
Likelihood Ratio |
7.999 |
6 |
0.238 |
|
N of Valid Cases |
144 |
||
|
a. 0 cells (0.0%) have expected count less than 5. The minimum expected count is 9.04. |
Add Answer to:
Region Blight
Plains Armillaria
Plains Armillaria
Plains Scleroderris
Plains Diplodia
Mountains None
Mountains None
Mountains Armillaria...
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