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:

Discounted Services

Services offered at reduced prices, often to attract customers or as a benefit for certain groups, such as employees or members.

Blue Cross / Blue Shield

A federation of health insurance organizations specializing in providing healthcare coverage to millions of people in the United States.

Preferred Provider Organizations

Health insurance plans that offer a network of healthcare providers who provide services to subscribers at a lower cost compared to out-of-network providers.

PPO Service Area

The geographic region or locations where a Preferred Provider Organization (PPO) health insurance plan offers coverage through its network of preferred providers.