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Question 5 A random sample of 105 light bulbs had a mean life of = 441 hours with a population standard deviation of =
Question 5 A random sample of 105 light bulbs had a mean life of = 441 hours with a population standard deviation of = 40 hours. Construct a 90% confidence interval for the mean life, , of all light bulbs of this type.
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Introduction to Real Analysis
Authors: Robert G. Bartle, Donald R. Sherbert
4th edition
471433314, 978-1118135853, 1118135857, 978-1118135860, 1118135865, 978-0471433316
