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What is the sigma x-bar of sample

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Reference no: EM132399909

You have joined a large tire manufacturer in eastern North Carolina. The company makes a 55,000 mile tire. The standard deviation on the life of this tire is 10,000 miles. You have pulled a sample of 40 tires and examined the life of these tires in miles traveled.

  • Can you use the normal distribution for the average and standard deviation of this sample? Blank 1 (yes or no)
  • What is the sigma x-bar of this sample? (no decimal is needed)
  • What percentage of the sample means will be less than 58,000 miles?
  • What percentage of the sample means will be more than 58,000 miles.

Reference no: EM132399909

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