Question

approximate the mean of the frequency distribution for the ages of the residents of a town.

age frequency
0-9 23
10-19 38
20-29 21
30-39 28
40-49 25
50-59 55
60-69 40
70-79 14
80-89 3

the approximate mean age is years.
(round to one decimal place as needed.)

Explanation:

Calculate class midpoints and products with frequencies

$$
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$$

Sum the frequencies and products

$$
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$$

Calculate the approximate mean

$$
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$$

Answer:

The approximate mean age is <blank>41.0</blank> years.