Year Mississippi

1997 1

1998 12

1999 0

2000 3

2001 10

2002 4

2003 1

2004 2

2005 5

2006 2

Above table show number of successful death row appeals to the State Supreme Court from Mississippi over a ten-year period.

The mean number of successful appeals in the state is 4.

Calculate standard deviation (s) and variance (s²⁾