A government agency states that the mean annual salary of civilian federal employees is the same in California and Illinois. The mean annual salary for 180 civilian federal employees in California is $66,210 and the standard deviation is $6385.The mean annual salary for 180 civilian federal employees in Illinois is $67,390 and the standard deviation is $5998. At is there enough evidence to reject the agency’s claim? (Adapted from U.S. Office of Personnel Management)