Enegineers: Statistics question

[Popeye the Sailor]

If you have any specific questions, post them up, I am sure someone on here can answer it 

That right there is frightening.

[He Man]

 

That's not my experience...we just don't use involved statistics. We all do our share of calculations, particularly at the staff and senior staff levels.

That sounds nice. cause i dont like statistics.

[Major Slow]

I had to take it. Never used it. CE also.

As an EE I have used statistics a bunch.... Design of experiments and all. Glad to see others have manage to live their lives without this discipline. Everything you ever need to know is in the Radio Engineer's Handbook. Its a real page turner.

[iDuc]

"teach myself the class".   Good thing tuition is cheap- otherwise you might be pissed that you weren't being provided a proper learning environment.    (been there  )

[DCXCV]

That right there is frightening.

Yeah, he didn't say "correctly"

[Howie]

If you have any specific questions, post them up, I am sure someone on here can answer it 

mitt

And what is the probability of that?



Sorry, I couldn't resist

[mitt]

And what is the probability of that?



Sorry, I couldn't resist

Well, while someone was typing any answer, the DMF could crash, and die, therefore someone not answering.  The odds of that are about 1 in 12 

mitt

[mitt]

Probably the difference between ME's and CE's - ME's mass produce a lot of little things with low margins for working, so we need to test and improve until it just works most of the time (classic stat problem, what is your failure rate, or time to failure).  CE's need to design one big thing, and it has to work the first time, for a long time, thus a lot of over design is built in, no statistics required.

mitt

[He Man]

CE's need to design one big thing, and it has to work the first time, for a long time, thus a lot of over design is built in, no statistics required
mitt

tell that to the MTA that coudlnt figure out that the new station they built was too wide for a train to the enter and rectifyed it so a train couldnt enter at all, then finally fixed it but realize that the sea wall is leaking. thats why the metrocard fare is set to increase from $83 monthly to $103 monthly.


OKAY first question for Statistics...there is an equation in bionmial probablity... say for a question where you have N(75,15) cov of 20%, what is the probability that the interval betwen 2 server earthquakes will be less than 65 years?

the answer is phi(65-75/15), what the hell is phi? you end up geting phi(-0.6777)=.254. My teacher writes "phi" as a 3 or a script z. And im not sure if she means phi, or psi. she doesnt ever go into the complex examples in the book. All her examples are basic to the point of traffic lights, balls in a box, and roads that close. 

[He Man]

nevermind to the above. When she said psi, phi, or zi, or wahtever she ment, she was saying Z. and that number is suppose to match up with the Z-score chart we got. son of a gun!

never mind it was Xi. the Z was actually a helical thingy