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The mean, or average, of a data set is equal to the sum of all the data points divided by the number of data points there are. In this case, you have 11 points of data. So, this is what you'll want to do:

(3+12+28+12+12+13+15+26+16+12+27)/(11) = 176/11 = 16

The mean is 16.

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12y ago
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Q: What is the mean of 3 12 28 12 12 13 15 26 16 12 27?
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