suppose that the weight of an adult male has a mean of 175 pounds and a standard deviation of 40 pounds. also, the weight of an adult female has a mean of 140 pounds and a standard deviation of 30 pounds. if i were to randomly select 5 males, what would be the mean and standard deviation of their combined weights? if i were to randomly select 2 men, what are the mean and standard deviation of the difference in their weights? find the mean and standard deviation of the weight of an adult woman.