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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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fundai! fundai!
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6 years ago
The manager of the service department of a local car dealership has noted that the service times of a sample of 30 new automobiles has a standard deviation of 6 minutes. A 95 confidence interval estimate for the standard deviation of the service times for all its new automobiles is _____.
 a. 16.05 to 45.72
  b. 4.78 to 8.07
  c. 2.93 to 6.31
  d. 22.83 to 65.06
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tiss9889tiss9889
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