The quality control manager at a light bulb factory needs to determine whether the mean life of a large shipment of light bulbs is equal to 450 hours. A random sample of 100 light bulbs indicates a sample mean life of 465 hours with 60 hours of the sample standard deviation. At the 0.01 significance, is there evidence that the population mean life is different from 450 hours? Solve this problem based on critical value approach. (Show me every step including pre-step and post-step for full credit)
The quality control manager at a light bulb factory needs to determine whether the mean life of a large shipment of light bulbs is equal to 450 hours. A random sample of 100 light bulbs indicates a sample mean life of 465 hours with 60 hours of the sample standard deviation. At the 0.01 significance, is there evidence that the population mean life is different from 450 hours? Solve this problem based on critical value approach. (Show me every step including pre-step and post-step for full credit)
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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The quality control manager at a light bulb factory needs to determine whether the
life of a large shipment of light bulbs is equal to 450 hours. A random sample of 100 light
bulbs indicates a sample mean life of 465 hours with 60 hours of the sample standard
deviation. At the 0.01 significance, is there evidence that the population mean life is different
from 450 hours? Solve this problem based on critical value approach.
(Show me every step including pre-step and post-step for full credit)
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