Statistics

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Problem 1

The distribution of ages in the United States in the year 2010 is given below. Intervals include the left endpoint but not the right; the number of people aged 100 or more was not zero but it was so small that it makes no difference to the table. You can assume that the ages are uniformly distributed within each interval.
Age (Years) Percent
0-5 6.6
5-15 13.3
15-20 7.1
20-30 13.8
30-45 19.8
45-60 20.9
60-75 12.5
75-100 6.0
Source: Adapted from Statistical Abstract 2012
: 3.0 points

Each part is worth 1 point.

a) Which interval contained more people: 5-15 or 15-20?
5-1515-20

b) Which interval was more crowded: 5-15 or 15-20?
5-1515-20

c) Were there more 5-year-olds or 15-year-olds?
5-year-olds15-year-olds

  1. hack

    a) 5-15

    b) 15-20

    c) 15-year-olds

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