Question

1. 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

1. What's the p-value?

1 points

Question 7

1. What's the critical value?

1 points

Question 8

1. What's the decision?

   		Reject H0
   		Don't Reject H0
   		Reject HA
   		Don't Reject HA

1 points

Question 9

1. What's the expected rank sum for column A if the null hypothesis of identical distributions is true?

Answer 1

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