Eunuchs (castrated human males) were often used as servants and guards in harems in Asia and the Middle East. In males of some mammal species, castration increases life span. Do eunuchs also have long lives compared to other men? The accompanying graph shows data on life spans of 81 eunuchs from the Korean Chosun Dynasty between about 1400 and 1900, according to historical records.

These data are compared with life spans of non-eunuch males who lived at the same time, and who belonged to families of similar social status n = 1126, 1414, and 49 for the three families shown). Data from Min et al. (2012), with permission.

a. What type of graph is this?

b. What do the upper and lower margins of the boxes indicate?

c. Which male group had the highest median longevity?

d. Although the mean is not indicated on the graph, which sample of men probably had the highest mean longevity? Explain your reasoning.

Transcribed Image Text:

Life span (years) 110 100 90 80 70 60 50 40 30 20 10 0 Eunuch Mok Shin Male group Seo