Items 5 through 9 refer to the following:
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 |
150 |
157 |
143 |
154 |
161 |
147 |
156 |
163 |
151 |
157 |
166 |
154 |
161 |
170 |
156 |
question 5 Give the value of the Kruskal-Wallis test statistic for the above data.
1 points
Question 6
What's the p-value?
1 points
Question 7
What's the critical value?
1 points
Question 8
What's the decision?
Reject H0 |
||
Don't Reject H0 |
||
Reject HA |
||
Don't Reject HA |
1 points
Question 9
What's the expected rank sum for column A if the null hypothesis of identical distributions is true?
5) value of the Kruskal-Wallis test statistic for the above data =9.3800
6) p-value =0.0092
7) critical value =5.991
8)
Reject H0
9)
expected rank sum for column A if the null hypothesis of identical distributions is true =120/3 =40
Items 5 through 9 refer to the following: The following data represent the breaking strengths of...
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