Recently, a health care hospital conducted a weight loss test for a period of 1 week. Participants lost an average of 9 kg. Male participants lost an average of 13 kg and female participants lost an average of 7 kg. Doctors attributed the difference in weight loss between men and women to weight loss before weight loss for men. Participants are heavy. Which of the following conclusions can be drawn from the above? ['Female participants weigh less than male participants before losing weight.', 'All participants lost weight.', 'More female participants than male participants.', 'Male participants are lighter than female participants after losing weight.']