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A manufacturer of car batteries claims that the life of the company’s batteries in years is...

A manufacturer of car batteries claims that the life of the company’s batteries in years is approximately normally distributed with a population variance of 0.81. If a random sample of 10 of these batteries has a variance of 1.44

  1. which set of hypotheses is most appropriate to test the claim that the population variance is more than 0.81?
  1. Which test statistic is appropriate?

  1. Calculate the value of the test statistic.
Math   Statistics-And-Probability   
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