Author Question: Ten high-technology batteries are tested for 200 hours each. One failed at 20 hours; another failed ... (Read 125 times)

kwoodring · **on:** Dec 3, 2019

Question 1

Ten high-technology batteries are tested for 200 hours each. One failed at 50 hours; all others completed the test. FR(%) is ________ and FR(N) is ________.
◦ 10%; 1/2000
◦ 10%; 1/1850
◦ 25%; 1850 hours
◦ 90%; 1/2000
◦ Indeterminate; no standard deviation is given.

Question 2

Ten high-technology batteries are tested for 200 hours each. One failed at 20 hours; another failed at 140 hours; all others completed the test. FR(%) is ________ and MTBF is ________.
◦ 10%; 1980 hours
◦ cannot calculate from information provided
◦ 20%; 1760 hours
◦ 80%; 920 hours
◦ 20%; 880 hours

amy.lauersdorf90 · **Reply #1 on:** Dec 3, 2019

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