Quinn mailed four postcards that each cost $0.25, five letters that each cost $0.44, two large envelopes that each cost $0.80, and one small package for $5.10. Which cost on the list of mailing fees on Quinn’s receipt would skew the mean?

The small package cost $5.10, much more than the other individual mailing fees: $0.25, $0.44, and $0.80. Because the mean uses every fee, this unusually high cost pulls the mean upward and skews it. The cost of the small package is choice D.

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