In a Wilcoxon Rank Sum Test N₁ = 12, N₂

question 102

Multiple Choice

In a Wilcoxon rank sum test n₁ = 12, n₂ = 15 and the sum of R₁ = 108. The value of the test statistic for the normal approximation is:

• A)-1.23.
• B)-2.93.
• C)-108.
• D)108.
• E)15.

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Definitions:

Herfindahl Index

An indicator used to measure the size of firms in relation to the industry and an index of market concentration.

Barriers to Entry

Factors that prevent or hinder new firms from entering an industry, including high startup costs and regulatory restrictions.

Product Differentiation

The process by which companies distinguish their products from those of competitors in the eyes of consumers, through unique features, design, quality, or branding.

Concentration Ratio

A measure used to determine the market share or relative size of the top firms in an industry as an indicator of the level of competition.