college math
posted by Anonymous on .
8. Sample data on employee age for a large auto parts manufacturer are as follows:
Employee Age Frequency
2529 25
3034 33
3539 62
4044 26
4549 31
5054 8
What is the mean age of the employees?
(Points: 5)
37
37.32
37.78
38.83

Take the weighted sum: 25*(25+29)/2 + 33*(30+34)/2 + ...
and divide by the sample size: 25 + 33 + ...