Compute and interpret mean, median, range, and interquartile range in context.
Find the mean
Problem
Calculate the mean of \(6,~8,~9,~\text{and}~13\).
Big Picture
What this problem is really about
Think of the mean as redistributing the data total equally across all observations. Add every value exactly once, count how many values contributed to that sum, and divide the total by that count. A quick balance check is that deviations above and below the resulting center should cancel.
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