Mathematics, 16.04.2020 02:58 veve1787
A new extended-life light bulb has an average life of 750 hours, with a standard deviation of 50 hours. If the life of these light bulbs approximates a normal distribution, about what percent of the distribution will be between 650 hours and 850 hours?
A. 95%
B. 68%
C. 99%
D. 34%
Answers: 1
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