Mathematics, 17.12.2021 01:00 HistoryLee

The manager of a grocery store has selected a random sample of 100 customers. The average length of time it took these 100 customers to check out was 3.0 minutes. It is known that the standard deviation of the checkout time is 1 minute. Refer to Exhibit 8-2. With a .95 probability, the sample mean will provide a margin of error of

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