Listed below are amounts of strontium-90 (in millibecquerels or mBq) 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). Identify any of the values that are unusual.

Find the range, variance, and standard deviation for the given sample data. Include appropriate units (such as ?minutes?) in your results. (The same data were used in Section 3-2 where we found measures of center. Here we find measures of variation.) Then answer the given questions.

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