The following data represent the breaking strengths of samples of 20 gauge insulated copper wire from three different suppliers. The researcher is interested in finding evidence that the distribution of breaking strength differs by supplier. Use the .05 significance level and the Kruskal-Wallis test to answer the following questions.
|
Supplier
|
|
A
|
B
|
C
|
|
140
|
156
|
123
|
|
144
|
164
|
127
|
|
145
|
166
|
131
|
|
151
|
169
|
144
|
|
152
|
180
|
166
|
Which of the following correctly describes the p-value?
What is the critical value?
What is the correct decision?