A Random Sample of 1000 Customers at a Fast Food

question 158

Multiple Choice

A random sample of 1000 customers at a fast food restaurant had their service time recorded.Based on this sample,a 95% confidence interval for the average service time,in minutes,at the restaurant is computed to be [4.1,7.5].How would you interpret this interval?

• A)95% of all customers have a service time between 4.1 minutes and 7.5 minutes.
• B)We are 95% confident that the population mean service time is between 4.1 minutes and 7.5 minutes.
• C)We are 95% confident that the sample mean service time is between 4.1 minutes and 7.5 minutes.
• D)950 of the 1000 customers in the sample will have a service time is between 4.1 minutes and 7.5 minutes.
• E)If we select one new customer at random,the probability their service time will be between 4.1 minutes and 7.5 minutes is 0.95.

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