The manager of the service department of a local car dealership
has noted that the service...
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Statistics
The manager of the service department of a local car dealershiphas noted that the service times of a sample of 15 new automobileshas a sample variance of S2 = 16. A 95% confidence intervalestimate for the population variance of service times for all theirnew automobiles is: A. 8.576 to 39.794 B. 4.162 to 16.324 C. 4.126to 15.760 D. 2.928 to 6.308Ă‚Â Ă‚Â
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n sample size 15Sample variance 16Confidence level c 095alpha 1 c 1 095 005For a 95 confidence interval we have
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