Listed below are amounts of strontium-90 (in millibecquerels or mBq per gram of calcium) in a simple random sample of baby teeth obtained from Pennsylvania residents born after 1979 (based on data from ?An Unexpected Rise in Strontium-90 in U.S. Deciduous Teeth in the 1990s,? by Mangano, et al., Science of the Total Environment). How do the different measures of center compare? What, if anything, does this suggest about the distribution of the data?

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