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Michael's Tire Company performs free tire balance and rotation for the life of any tires purchased there on a first-come, first-served basis. One mechanic handles this and can usually complete the job in an average of 20 minutes. Customers arrive at an average rate of two per hour for this service.
a. How long will a customer expect to wait before being served?
b. How long will a customer expect to spend at the shop?
c. How many customers will be waiting, on the average?
d. What is the probability that the mechanic will be idle?
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The sample was collected by interviewers going to people's homes in randomly chosen areas in each of the 9 countries. The population represented by this sample was:
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Sarah is a 60 year old Anglo female in reasonably good health. She wants to take out a $50,000 term life insurance policy until she is 65.
Here are fifty observations on the weight of tea bags. Calculate the Standard Deviation and Variance.
Suppose a company owns three cars that get 20 miles per gallon, two cars that get 22 miles per gallon and one car that gets 24 miles per gallon. Would the mean miles per gallon be 22?
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