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Hi

Say I have the following bin sizes, where the number in paranthesis is the amount of data points contained in the bin:

20-29 : (2)

30-39 : (7)

40-49 : (12)

50-59 : (14)

How would I go about and find the mean for this binned data? I know that I should use

[tex]

mean = \frac{1}{N}\sum\limits_j {n_j x_j },

[/tex]

where binjcorresponds to a value x_{j}and contains n_{j}elements. But in my case, what are the values of the bins?

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# Homework Help: Statistics: How to find mean of bins

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