Chapter 8.3, Problem 22E

NEW YORK STATE COURTS' TOTAL CASELOAD The following table gives the total caseload in the New York State courts from 2004 through 2009.

Year	$2004$	$2005$	$2006$	$2007$	$2008$	$2009$
Cases (in millions)	$4.2$	$4.3$	$4.6$	$4.5$	$4.7$	$4.7$

Find the mean of the total caseload in the New York State courts from 2004 through 2009. What is the standard deviation for these data?