Find the mean and compare it with the median. Find the standard deviation and compare it with the interquartile range.

For the iron contents in Prob. 4

**Data from Prob. 4**

72.8 70.4 71.2 69.2 70.3 68.9 71.1 69.8 71.5 69.7 70.5 71.3 69.1 70.9 70.6

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