A Purchasing Agent for a Trucking Company Is Shopping for Replacement

Multiple Choice

A purchasing agent for a trucking company is shopping for replacement tires for their trucks from two suppliers. The suppliers' prices are the same. However, Supplier A's tires have an average life of 100,000 km with a standard deviation of 10,000 km. Supplier B's tires have an average life of 100,000 km with a standard deviation of 2,000 km. Which of the following statements is true?

A) The two distributions of tire life are the same
B) On average, Supplier A's tires have a longer life then Supplier B's tires
C) The life of Supplier B's tire is more predictable than the life of Supplier A's tires
D) The dispersion of Supplier A's tire life is less than the dispersion of Supplier B's tire life
E) The life of Supplier A's tire is more predictable than the life of Supplier B's tires