Exhibit 20

question 86

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 critical value approach,the appropriate conclusion is:

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

---

Definitions:

Sort

The process of arranging data in a specific order, either ascending or descending, based on one or more criteria.

Postal Codes

A series of letters, numbers, or both, assigned to different areas to facilitate mail sorting and delivery.

Short Text

A data type in database and software applications that is designed to hold small amounts of alphanumeric text, such as names or titles.

Form Wizard

An automated tool within software applications that guides users through the steps of creating forms, often used in databases.