The Manager of a Grocery Store Has Taken a Random

question 30

Multiple Choice

The manager of a grocery store has taken a random sample of 100 customers.The average length of time it took these 100 customers to check out was 3 minutes.It is known that the standard deviation of the population of checkout times is 1 minute.With a .95 probability, the sample mean will provide a margin of error of

• A) 1.96.
• B) .10.
• C) .196.
• D) 1.64.

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