Business, 21.07.2019 05:10 annaebrown4406

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?

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