what is a standard deviation in height
Standard Deviation is normally written as Ï The standard deviation for American men's height is about 3. Knowing that, we can figure out what the rest of the population looks like too. Each time height increases by 3, by a standard deviation, the population drops off considerably. There are just about exactly 100,000,000 adult men in America. Now that we know their average height is 5'9 and the standard deviation is 3, we can predict how many of these men fall into various height categories.
Mean female height: 64 in. Standard deviation: 2.8. Out of 100 million adult females in the US, less than 5 million of them are taller than 68.2 inches, or 5 8.2. Out of 100 million adult males, less than 5 million are shorter than 66 inches, or 5 .