The following table gives the total caseload in millions in

The following table gives the total caseload (in millions) in a state?s courts from 2004 through 2009. Year 2004 2005 2006 2007 2008 2009 Cases 4.7 4.5 4.4 4.8 4.1 4.8 Find the mean of the total caseload for the state?s courts from 2004 through 2009. (Round your answer to two decimal places.) million cases What is the standard deviation for these data? (Round your answer to two decimal places.) million cases

Solution

Mean = (4.7+4.5+4.4+4.8+4.1+4.8)/6 = 4.55 millions

variance = (4.7²+4.5²+4.4²+4.8²+4.1²+4.8²)/6 - 4.55² = 0.0625 millions^2

so standard deviation = .25millions