a. The operations manager of a large plant with four departments wants to estimate the person-hours lost per month from accidents. Describe a sampling plan that would be suitable for estimating the plant wide loss and for comparing departments.
b. A safety expert wants to determine the proportion of cars in his state with worn tire treads. The state license plate contains six digits. Use Excel or Minitab to generate a sample of 20 cars to be examined.
c. A statistics practitioner wants to estimate the mean age of children in his city. Unfortunately, he does not have a complete list of households. Describe a sampling plan that would be suitable for his purposes.
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