Recent content by Snarf

Oh. Now I see why you gave me that great hint. Now as far as your hint on the second one... very interesting, but a bit complex for me. The last time I took a calc class was about three years ago. Does this look like I'm getting close? =\int_{0}^{\infty}\int_{0}^{\infty}...

or is it -2ye^(y^2)?

So... for the first one would the answer be -2ye^(-y/2)?

Would it help if it was being integrated from negative infinity to infinity? Should have put that up initially :rolleyes:

neutrino the derivative of -y^2/2 would be -y?

-2ye^(-y^2) ?

The first one \exp\left(\frac{-1}{6}(y-1)^2\right)

sure. one moment...

I have a test tomorrow and I am hoping someone can help me with the following two integrals: 1. \inty[SIZE="2"]e^^{-y^{2}}/2dy For this one I am using substition with u=-y^{2}/2 and du = -y/4 What I don't understand is how we account for the first y in this integral. 2...

On the second problem it isn't an integral. Its a sum. Here is how I should have written it. \sume^{ty}[(1+2^{k+1}+3^{k+1})/6]

I see where I went wrong on the first problem. my dv and my v for the first integration by parts was switched. Thanks for clearing that up.

I'm in a mathematical statistics class and it is spanking me. Please help. I have two questions that will really help me understand things if I get a nice explanation. 1. A random variable Y has the following probability function p(y) = y^{2}/15 for y = 1, 2, 3. Findthe moment generating...

I think I've figured it out. Lambda is the mean and the variance for a Poisson distribution. So SQR 100 is the standard deviation in this problem. From there its a matter of solving for k and finding the interval.

[SOLVED] A Chebyshev interval with a poisson distribution Geophysicists determine the age of a zircon by counting the number of uranium fission tracks on a polished surface; the number of these uranium fission tracks on this surface follows a Possion distribution. A particular zircon is of...

Of course.