An E-Business/e-Commerce Information Technology Consulting Company Wants to Compare the Effectiveness

An e-business/e-commerce information technology consulting company wants to compare the effectiveness of three programming languages that its programmers use. Currently each programming language is used by approximately 1/3 of the programmers employed by the company. The director of the programming division randomly selected five programmers from the users of each of the three programming languages and assigned the same simple programming task to each programmer. It is known that all three populations have highly skewed distributions with extreme outliers. Which one of the following nonparametric tests is appropriate for this problem?

A) Wilcoxon signed ranks test
B) Wilcoxon rank sum test
C) sign test
D) Kruskal-Wallis test
E) Spearman's rank correlation test