All data in the book represents the “Average” costs for the universe, except for the Investment and Total Bundled Cost Quartile Chart which illustrates the “Median” costs for the universe.
The definition for both terms is as follows:
Average: Also known as Mean, is the sum of the values in the universe divided by the number of values in the universe.
Median: The median is the middle number of the distribution: half the numbers are above the median and half are below the median.
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