answer the following questions

You are given the following sample data:

Group 1	Group 2	Group 3
10	8	13
9	6	12
11	8	12
12	9	11
13	10	13
11	10	15

a) State the appropriate null and alternative hypotheses for determining whether a difference exists in the median value for the three populations.

b) Based on the sample data, use the Kruskal-Wallis ANOVA procedure to test the null hypothesis using=0.05. What conclusion should you reach?

please provide references