Multiple Choice
Assume the mean useful life of a particular light bulb is 2,000 hours and is normally distributed with a standard deviation of 300 hours. Calculate the useful life of the light bulb within two standard deviations of the mean.
A) Between 1,700 and 2,300 hours
B) Longer than 2,300 hours
C) Longer than 1,700 hours
D) Between 1,400 and 2,600 hours
Correct Answer:
Verified
Correct Answer:
Verified
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