The U.S. economy added 227,000 jobs in February, the Labor Department reported Friday, but the leap in job creation did not alter the 8.3 percent unemployment rate because people who gave up looking for work are actively seeking jobs again, analysts said. The stronger-than-expected increase was below the gain of 284,000 jobs in January, but is further sign that the U.S. economy is gradually recovering as companies hire to meet growing consumer demand. The manufacturing sector...