['ANALYSIS', '3', '7', 'In', '1', '5', 'i', 'i', '1', '2', '£', '.', '@', ']', 'Composition', ']', 'There', 'are', 'no', 'sudssantial', 'differences', 'beiween', 'the', 'two', 'sampiing', 'greuss', 'on', 'sex,', 'age,', 'income,', 'educzation,', 'employment.', 'race,', 'smcking', 'tencency', 'cr', '3MR', '#44-882']