Multiple Choice
Use the empirical rule to solve the problem.
-The lifetimes of lightbulbs of a particular type are normally distributed with a mean of 400 hours and a standard deviation of 12 hours. What percentage of the bulbs have lifetimes that lie within 2 Standard deviations to either side of the mean?
A) 97.72%
B) 99.74%
C) 95.44%
D) 68.26%
Correct Answer:
Verified
Correct Answer:
Verified
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