A Mann-Whitney U Test Was Performed to Determine If There

question 98

Multiple Choice

A Mann-Whitney U test was performed to determine if there were differences in the average compute time for Dallas residents versus Atlanta residents.The travel time for 22 commuters in Dallas was compared to the travel time for 28 commuters in Atlanta.The U statistic was calculated to be 58.0 based on the sample sizes of 22 and 28.What is the z value for this test?

• A) 51.17
• B) 308
• C) 0.117
• D) -4.88
• E) -2.44

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Definitions:

Marginal Cost

The cost of producing an additional unit of output, highlighting the concept of increasing or decreasing returns.

Equilibrium Price

The price at which the quantity of a good or service demanded by consumers equals the quantity supplied by producers, leading to market stability.

Rate of Sales

The speed at which a company's goods are sold or its services are provided within a specific period.

Constant-cost Industry

An industry in which the input costs do not change as the industry's output changes, leading to a flat supply curve.