The mean is calculated by adding all the numbers together and then dividing by the count of the numbers. So, we add 3.2, 2.5, 2.1, 3.7, 2.8, and 2.0 together to get 16.3. Then we divide 16.3 by 6 (the count of the numbers) to get the mean.
\[ \text{Mean} =
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