You have to know whether or not such figures are self-reported. I used to work in a job that required me to have our customers record their heights and weights--self-reported--, and I've seen hundreds of people, from all walks of life, do it. I learned something surprising by doing this. Most people--both men and women--tend to be honest about their weights. Most women tend to be honest about their heights. However, most men who are less than 6' tall, will exaggerate their heights by 2 or 3 inches (occasionally more). And by "most", I mean that at least 85% of men in that demographic, of all races, do this. Since I knew how tall I was, I could compare the height of a customer to my height, and get a good estimate of his. So I can tell you confidently, that if a man self-reports his height, the figure is very likely to be untrustworthy,
if his actual height is less than 6 feet. Apparently, a great many men are insecure about their heights, and want desperately to be "tall".
Men who were 6 feet tall, or taller, rarely, in my experience, exaggerated their heights. (I will have to say, that people shrink as they pass through middle age, and a couple of my relatives, who were once about 6'2", still claim to be, even though they're not.....
)