college math

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8. Sample data on employee age for a large auto parts manufacturer are as follows:
Employee Age Frequency
25-29 25
30-34 33
35-39 62
40-44 26
45-49 31
50-54 8

What is the mean age of the employees?

(Points: 5)
37
37.32
37.78
38.83

  • college math -

    Take the weighted sum: 25*(25+29)/2 + 33*(30+34)/2 + ...

    and divide by the sample size: 25 + 33 + ...

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