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Mathematics, 06.07.2021 20:10 bkimswift7
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. If the confidence coefficient is reduced to .80, the standard error of the mean . a. becomes negative b. remains unchanged c. will increase d. will decrease
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The manager of a grocery store has selected a random sample of 100 customers. The average length of...
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