The Owner of Touchdown Sports Bar Wants to Develop a Time

question 158

Multiple Choice

The owner of Touchdown Sports Bar wants to develop a time standard for the task of mixing a specialty cocktail. In a preliminary study, he observed one of his bartenders perform this task seven times with an average of 90 seconds and a standard deviation of 5 seconds.
How many observations should be made if he wants to be 95.44 percent confident that the maximum error in the observed time is 1 second?

• A)64
• B)86
• C)100
• D)144
• E)169

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Definitions:

Railway Labor Act

A U.S. law aimed at preventing strikes and encouraging fair labor practices in the railway and airline industries.

Labor Relations

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The global sector involving the provision and management of air travel services, including passenger and cargo transportation.

Workers' Compensation

A system of insurance that provides financial and medical benefits to employees injured in the course of employment.