Multiple Choice
The mean life of a particular brand of light bulb is 1000 hours and the standard deviation is 50 hours.It can be concluded that at least 89% of this brand of bulbs will last between ___.
A) 900 and 1100 hours
B) 950 and 1050 hours
C) 850 and 1150 hours
D) 800 and 1200 hours
E) 1050 and 1250 hours
Correct Answer:
Verified
Correct Answer:
Verified
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