A purchasing agent for a trucking company is shopping for replacement tires for

Question

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 tires have an average life of 60,000 miles with a standard deviation of 10,000 miles. Supplier B's tires have an average life of 60,000 miles with a standard deviation of 2,000 miles.

All the questions are T or F.
1) the two distributions of tire life are the same.
2) on average, supplier A's tires have a longer life than supplier B tires.
3) The life of supplier B's tire is more predictable than the life of supplier A's tires.
4) The dispersion of supplier A's tires life is less than the dispersion of suppliers B's tire life.

Basically I'm not sure what the standard deviation means in this situation.

Explanation / Answer

The life of Supplier B's tire is more predictable than the life of Supplier A's tires

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