Cornell Law School publishes a web interface to data compiled over the course of seventeen years by the Administrative Office of the United States Courts and the Federal Judicial Center.
You can select the type of case in which you are interested, the year from 1978 through 1995 (or all seventeen years), particular districts, circuits, or all districts. You can limit your inquiry to jury trials, judge trials, or combine them.
This database can report the number of cases, their duration, the win rate for plainitffs, the type of relief, the amounts sought in these cases, and the amounts actually awarded.
It's a remarkable publicly accessible tool for going beyond opinion about how cases in litigation ought to come out to data about how they in fact have come out.
If you're statistically inclined, you'll find the Federal District Court Civil Trial Database to be a uniquely valuable resource.