Recent content by bryandnk

so does anyone know if I did this right?

Homework Statement [PLAIN]http://img19.imageshack.us/img19/7396/66899700.jpg The Attempt at a Solution Please help, Would the power test be something like: beta = P(Z < Z_alpha_2 - delta/(1/m+1/n)^.5) power = 1 - beta

no one can help?

Homework Statement Consider the distributions N(mu1, 400) and N(mu2, 225). Let theta = mu1-mu2 and x and y be the observed means of two independent random samples, each of size n, from these two disbtibutions. We reject H(0) : theta = 0 and accept H(a): theta >0 if and only if x-y >=C. If...