The p.d.f. of time X to failure of an electronic component is

a) Compute P(X>2000)

b) Determine the 75th percentile, , of the distribution

c) Find the 10th and 60th percentiles, and

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- Apr 17th 2009, 11:30 AM #1

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- Apr 17th 2009, 12:58 PM #2

- Apr 23rd 2009, 07:22 AM #3

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- Apr 24th 2009, 11:04 AM #4

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For part b, I set the equation up as with limits with but got an answer of 0.000000564, which seems too small to be correct. I tried it also with 75 as my upper limits and got 0.00561, which doesn't seem right either. Can anyone help me figure out what I am doing wrong? Thank you.

- Apr 24th 2009, 03:00 PM #5

- Apr 25th 2009, 08:48 AM #6

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When I take the integral, I get the equation . Then taking the ln of both sides leaves . Multiplying both sides by -1000000 gives , so x=536.36? Is this how you would solve for x? I don't know what to do with the -e. That's where I got stuck and was looking for an alternative way to solve the problem. Hopefully I have the right idea. Thank you.

- Apr 25th 2009, 04:19 PM #7

- Apr 26th 2009, 08:48 AM #8

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- Apr 26th 2009, 10:23 AM #9

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