Average height refers to the typical height of a group of people, calculated by measuring the heights of individuals and finding the mean value. This measurement can vary significantly based on factors such as age, gender, and geographic location. For example, the average height for adult men in the United States is about 5 feet 9 inches, while for women, it is approximately 5 feet 4 inches. Average height can also change over time due to improvements in nutrition, health care, and living conditions. In many countries, the average height has increased over the past century, reflecting better overall health and well-being among populations.