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

question 21

Multiple Choice

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 5 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 rank test
• B)Wilcoxon rank sum test
• C)Sign test
• D)Kruskal-Wallis test
• E)Spearman's rank correlation test

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Definitions:

True Inequality

A statement of inequality that is valid for the values it involves.

Real Number Line

A line that graphically represents all possible real numbers, both positive and negative, including integers and fractions.

Ascending Order

Arranging numbers or other elements in a sequence from the smallest to the largest value.

Approximate

To approximate means to find a value close to the exact answer, often through estimation or rounding.