Question

Below is a table showing population age group projections made by the US Census Bureau for the year 2025
Age Group Number of People (millions)
0 to under 20.............. 94.3
20 to under 40............ 92.9
40 to under 60................. 85.0
60 to under 80........... 70.3
80 to under 100............ 14.8
100 to 120.............. .1
Total = 357.4
a. Convert the frequency table to a relative frequency table.
b. Use the relative frequency table to approximate the mean, variance and standard deviation for the age data represented.


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  • CreatedJuly 16, 2015
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