Exhibit 20

question 1

Multiple Choice

Exhibit 20.2.A trading magazine wants to determine the number of hours stock brokers work each week.In particular,the trading magazine wants to determine if the median numbers worked per week differs from 100 hours.The magazine samples 18 traders.For the Wilcoxon Signed-Rank Test,the value of the test statistic is . Refer to Exhibit 20.2.Using the p-value approach and ,the appropriate conclusion is:

• A)Reject the null hypothesis,conclude the median number of hours worked per week differs from 100
• B)Reject the null hypothesis,cannot conclude the median number of hours worked per week differs from 100
• C)Reject the null hypothesis,conclude the median number of hours worked per week is greater than 100
• D)Reject the null hypothesis,cannot conclude the median number of hours worked per week is less 100

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Definitions:

Pigouvian Taxes

Taxes designed to reduce external costs.

External Costs

costs inflicted upon a third party when goods and services are produced and consumed.

Tradable Emissions Permits

Licenses to emit limited quantities of pollutants that can be bought and sold by polluters.

Pollution Permits

Licenses that allow entities to emit a specific amount of pollutants into the environment, often traded in markets.