Question
1.A company wants to know the useful life of a new revolutionary lightbulb it has just developed.A mean of 64 of these bulbs revealed a
1.A company wants to know the useful life of a new revolutionary lightbulb it has just developed.A mean of 64 of these bulbs revealed a mean useful life of 30,000 with a standard deviation of 1,500 hours.
A.Use this information to develop a 95% confidence interval for the mean useful life of all new revolutionary lightbulbs.
B.Use this information to develop a 98% confidence interval for the mean useful life of all new revolutionary lightbulbs.
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Elementary Statisitcs
Authors: Barry Monk
2nd edition
1259345297, 978-0077836351, 77836359, 978-1259295911, 1259295915, 978-1259292484, 1259292487, 978-1259345296
