|Jan27-05, 06:02 PM||#1|
poisson distribution problem
so flaws in metal produced by high temperatures occure at a rate of 1 per 10 square feet. what is the probability that there is 3 or more flaws in a 8 x 5 feet.
ok, so I know we need to use poisson disstribution on this, e^-np * np^k/k!.
howver, I dont know my np.
so 1 per 10 square feet means 1 per 10 x 10 feet....maybe we can say this is the same as .1 per 1 x 1 feet.
so how do I put this in terms of 8 x 5 feet?
|Jan27-05, 06:08 PM||#2|
8*5 = 40 square feet...
you have 1 per 10 square feet.... that's means....
even a 10 years old kids can do this problem...
what grade are you in? I don't realize middle school teachers start teaching poisson equation to the 7th grader.....
|Jan27-05, 06:54 PM||#3|
haha...whoops, wasn't thinking about this...I got it...haha
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