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Approximate the Mean of the Group Data

Approximate the mean of the grouped data.
The age distribution of students in a statistics class.
Age frequency
20-29 23
30-39 24
40-49 23
50-59 19
60-69 8
What is the mean age of the students based on this given frequency distribution?
Round to the nearest hundredth.

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We can use the average of each age interval to estimate the mean, so we ...

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