The mean amount of precipitation from 2005 to 2013 is 5.33 inches.
It is given that
precipitation in 2005 = 5.98 inch
precipitation in 2006 = 6.05 inch
precipitation in 2007 = 7.59 inch
precipitation in 2008 = 5.27 inch
precipitation in 2009 = 3.11 inch
precipitation in 2010 = 7.18 inch
precipitation in 2011 = 2.95 inch
precipitation in 2012 = 7.22 inch
precipitation in 2013 = 2.61 inch
The mean value is the ratio of the sum of all observations to the number of observations.
Sum of observation = 47.96
Number of observations = 9
Mean = 47.96/9 = 5.33 inches
Therefore mean amount of precipitation from 2005 to 2013 is 5.33 inches.
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