Stephanie M. answered 05/12/15
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Based on how a box plot is created, the center line marks the data set's median. You can't find the exact values for the other two just by looking.
The other lines of the box plot tell you Quartile One (the median of the lower half of the data) and Quartile Three (the median of the upper half of the data), the ends of the box plot tell you the lowest and highest non-outlier values in the data set, and any circles or stars outside the box and its whiskers mark outliers of the data set.