Age Distribution of Twenty-Somethings. The following table shows the number of Americans (in millions) between 20 and 29 years old in 2011. Use this data for Exercises 22–25.

Question 3.463

ages20s

25. Compare your answer in the previous exercise to the actual proportion of twenty-somethings whose ages lie between the values found in the previous exercise. What does this discrepancy mean, regarding the distribution of ages in the table?

Age Number (millions)
20 4.5
21 4.4
22 4.3
23 4.2
24 4.2
25 4.3
26 4.2
27 4.2
28 4.2
29 4.2
Table 3.108: Source: U.S. Census Bureau.

3.99.25

59.48%. The distribution is not bell-shaped.