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:

Savings Account

A deposit account held at a bank or other financial institution that provides principal security and a modest interest rate.

Behavioral Economic Explanation

An interpretation derived from behavioral economics, focusing on psychological, social, and cognitive factors affecting economic decisions.

Macroeconomics

The branch of economics that studies how the aggregate economy behaves, focusing on indicators like GDP, unemployment rates, and inflation.

Personal Hygiene

The practice of maintaining cleanliness and grooming of the physical body to enhance health and well-being.