Analyse seems to have been the more common spelling in 17th- and 18th-century English, but many of the great dictionaries of that time â John Kersey's of 1702, Nathan Bailey's of 1721 and Samuel Johnson's of 1755 â prefer analyze. In Canada, -yze prevails, just as in the US.
Oven Cooking. To slow-cook a rump roast in the oven, set the oven to 250 F. At this temperature, the roast will cook in about four hours, depending on the size of your roast. Place the roast in an oven-proof pot or Dutch oven with a lid. Add 1/2 to one cup of broth or red wine, so that the roast is partially covered.
Slow Cooker Basics. A slow cooker is an optimal choice for cooking a rump roast because of its consistent low temperature. With standard cooking temperature varying between 175 and 200 degrees Fahrenheit, it takes at least eight to 10 hours to cook a 3-pound rump roast on the lowest heat setting, and five to six hours on high.