Mathematics, 04.12.2019 02:31 bandnerd1
Acompany installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, and distribution approximated by a normal curve. find the percentage of bulbs that can be expected to last the period of time. less than 690 hours
a. 97.06%
b. 47.14%
c. 97.1%
d. 97.2%
Answers: 1
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Acompany installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 10...
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