Exhibit 20

question 63

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.Since the sample size is at least 10,T can be assumed normally distributed with mean and standard deviation:

• A)85.50,527.25
• B)22.96,527.25
• C)22.96,85.50
• D)85.50,22.96

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Definitions:

Three-Phase Connection

A method of electrical power distribution that uses three alternating currents of the same frequency and amplitude, which are offset in time to provide a more constant and efficient power supply.

Inductive Loads

Electrical components or devices, such as motors or transformers, that primarily use magnetic fields to function, causing a phase shift between the voltage and current.

Delta

A method of electrical connection in which each side of a load is connected to a vertex of a triangle-like configuration, with power supplied at each vertex.

Wye

An electrical configuration where three components are connected at a single common point, forming a Y shape.