Question: A printer produces small books for a variety of customers. When pricing its services they want to account for the “waste” factor. Waste is the number of flawed books not delivered to the customer. The amount of waste in part is influenced by the number of books requested by the customer. The quality assurance manager selects a random sample of orders where the customers requested between 10,000 and 15,000 books.

A. What is the mean and standard deviation for the sample?

B. Calculate and interpret a 95% confidence interval for the average waste.

C. How could this information be used by the printer when quoting prices for customers?