The Owner of Touchdown Sports Bar Wants to Develop a Time

question 41

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 five 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 one second?

• A) 64
• B) 86
• C) 100
• D) 144
• E) 169

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Definitions:

Regression Toward

A statistical phenomenon that describes how extreme scores on a variable tend to be closer to the average on subsequent measurements.

Emotional Distress

A negative emotional state that may arise from various causes, including stress, anxiety, or traumatic events.

Mode

The most common number found in a set of data.

Distribution

In statistics, the way in which values of a variable or frequencies of occurrence are spread out over a range.