That’s not too important. If I go to my closet and pull out twenty items of clothing at random, and designate those group A, and designate the rest group B, if I know what is in each group I can still make predictions about traits of random members of either group.
That’s not too important. If I go to my closet and pull out twenty items of clothing at random, and designate those group A, and designate the rest group B, if I know what is in each group I can still make predictions about traits of random members of either group.