Dear Statalist users,

I'm using Kruskal Wallis test as a non-parametric test for comparing three groups of analysis (P, A and B). My dependent variable is a measure of efficiency, with values that range from 0 to 1.

However I am not quite understanding the obtained output in what concerns the "rank sum" column, which is as follows.

Further, is it correct to say that the results indicate that there is a statistically significant difference among the three type of firms?

Thanks,

Maria

I'm using Kruskal Wallis test as a non-parametric test for comparing three groups of analysis (P, A and B). My dependent variable is a measure of efficiency, with values that range from 0 to 1.

However I am not quite understanding the obtained output in what concerns the "rank sum" column, which is as follows.

Further, is it correct to say that the results indicate that there is a statistically significant difference among the three type of firms?

Code:

. kwallis theta if Y==2014, by(type) Kruskal-Wallis equality-of-populations rank test +-------------------------+ type Obs Rank Sum -------+-----+----------- P 411 109374.50 A 223 111253.50 B 190 119272.00 +-------------------------+ chi-squared = 340.233 with 2 d.f. probability = 0.0001 chi-squared with ties = 340.234 with 2 d.f. probability = 0.0001

Maria

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