Madison Water Utility offers bill credits (rebates) for customers who replace high water using toilets with EPA WaterSense-rated High Efficiency Toilet models. Monthly average rebates can be determined from 2009 to 2013 data. From the figure, which is higher, the mean or the median?

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Relative frequency 0.5 0.4 0.3 0.2 0.1 0.0 100 300 400 Average monthly rebate (in $) 200 500