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A random sample of 56 fluorescent light bulbs has a mean life of 645 hours and assume that the population standard deviation is 31
A random sample of 56 fluorescent light bulbs has a mean life of 645 hours and assume that the population standard deviation is 31 hours. Construct a 95% confidence interval for the population mean. OA. (636.9,653.1) OB. (112.0,118.9) OC. (539.6,551.2) OD. (712.0,768.0)
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Forecasting Time Series And Regression
Authors: Bruce L. Bowerman, Richard O'Connell, Anne Koehler
4th Edition
0534409776, 9780534409777
