can anyone get me going on this problem:
"Find the likelihood ratio test for testing equality of variances of two independent, normally distributed variables X and Y, their random samples being respectively X_1, ..., X_m and Y_1, ..., Y_n. Both expectation and variance of each variable are unknown."
my question is, how do I apply LR-method to this problem? i've tried, but failed to get the test statistic that i should be getting: Sx^2 / Sy^2
(Sx^2 and Sy^2 being the sample variances).