The mean life of light bulbs produced by the Brite Lite Bulb Company is 950 h with
Question:
The mean life of light bulbs produced by the Brite Lite Bulb Company is 950 h
with a standard deviation of 225 h. Assume that the population is normally
distributed. Suppose you take a random sample of 12 light bulbs.
(a) What is the mean of the sample mean life?
(b) What is the standard deviation of the sample mean?
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Given Population mean 950 hours Population standard ...View the full answer
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Related Book For 
Statistics For Business And Financial Economics
ISBN: 9781461458975
3rd Edition
Authors: Cheng Few Lee , John C Lee , Alice C Lee
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