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The owner of Touchdown Sports Bar wants to develop a time standard for the task of mixing a specialty cocktail . In a preliminary study,
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
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