What kind of equality? See
http://en.wikipedia.org/wiki/Random_...ndom_variables
"Equality of means" is relatively easy to test (e.g. t-test). "Equality of distributions" is harder, although I can think of the following:
1. You can study tests for equivalence of distributions, such as
Chi-square or
Kolmogorov-Smirnov.
2. You can calculate the
Gini coefficient then test whether it equals zero. (This may be a version of the K-S test.)
3. If you know their distributions, you can express each series as 30 successive order statistics, and jointly test their equivalence for as many orders as your
degrees of freedom will let you. You'll need to derive the distribution of the difference between two order statistics, X(k) - Y(k), for k = 1 through 30, which can take some algebraic work.
