Homework Help: Statistics

Posted by Tykrane on Thursday, December 17, 2009 at 10:42am.

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 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 deviation of 2,000 miles. 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 than Supplier B's tires.

C. the life of Supplier B's tires 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.

Statistics - Ms. Sue, Thursday, December 17, 2009 at 12:01pm
If you post YOUR answer, we'll be glad to check it.
Statistics - PsyDAG, Friday, December 18, 2009 at 11:32am
What does the difference in standard deviations tell you?

I hope this helps.
Statistics - c, Friday, September 10, 2010 at 4:56pm
c
Statistics - danny, Wednesday, February 8, 2012 at 11:07pm
b
Statistics - John, Friday, March 16, 2012 at 6:26pm
b
Statistics - erin, Thursday, April 26, 2012 at 4:56pm
b

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