The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7,500 hours. The population standard deviation is 1,000 hours. A random sample of 64 CFLs indicates a sample mean life of 7,250 hours. Match the followings concepts to their correct interpretations in the context of the question: Null hypothesis Alternative hypothesis Type I error Type II error A. The mean life of a large shipment of CFLs is equal to 7,500 hours. B. The mean life of a large shipment of CFLs is equal to 7,500 hours and you conclude that it is not equal to 7,500 hours. C. The mean life of a large shipment of CFLs is not equal to 7,500 hours. D. The mean life of a large shipment of CFLs is not equal to 7,500 hours and you conclude that it is equal to 7,500 hours.
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The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7,500 hours. The population standard deviation is 1,000 hours. A random sample of 64 CFLs indicates a sample mean life of 7,250 hours.
Match the followings concepts to their correct interpretations in the context of the question:
Null hypothesis
Alternative hypothesis
Type I error
Type II error
A. The mean life of a large shipment of CFLs is equal to 7,500 hours.
B. The mean life of a large shipment of CFLs is equal to 7,500 hours and you conclude that it is not equal to 7,500 hours.
C. The mean life of a large shipment of CFLs is not equal to 7,500 hours.
D. The mean life of a large shipment of CFLs is not equal to 7,500 hours and you conclude that it is equal to 7,500 hours.
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