gaussian distribution-Synonym(s): gaussian curve. graphical distribution of normal data, following a bell-shaped curve; the mean, median and mode all coincide at the central high point of the curve; 67% of data lie within Â± 1 standard deviation (sd) of the spread of the sample data; 95% lie within Â± 2 sds.
The Los Angeles plant is one of Exxon's four refineries in the United States that do not have an adjacent chemical plant. A second, in Chalmette, Louisiana, which Exxon operates jointly with Petroleos de Venezuela, is currently on the block. The other two refineries that are not integrated are located in Joliet, Illinois, and Billings, Montana, and process North American crude oil. As a matter of practice, we do not comment on market speculation or rumor, said Todd Spitler, a spokesman for Exxon Mobil.
March 24, 2014 marks the 25th anniversary of one of the worst environmental disasters in U.S. history. The Exxon Valdez oil spill began when a 987-foot-long oil tanker ran aground on a reef in Prince William Sound, Alaska. The spill stood as the worst in U.S. history until BP's Deepwater Horizon spill in the Gulf of Mexico in 2010. The Exxon Valdez released an estimated 10.8 million gallons of crude oil before the spill was contained, fouling about 1,300 miles of coastline. The remote location of the spill and a delayed and inadequate response from Exxon and Trans-Alaska Pipeline operator Alyeska made matters even worse.