you mean the mean frequency I suppose?
add them up and divide by 4
The following frequency table contains the total number of deaths worldwide as a result of earthquakes from 2000 to 2012.
Year Deaths
2000 231
2001 21,357
2002 11,685
2003 33,819
2004 228,802
2005 88,003
2006 6,605
2007 712
2008 88,011
2009 1,790
2010 320,120
2011 21,853
2012 768
Total 823,756
What is the frequency of deaths from 2006 through 2009?
4 answers
add the deaths for 2006,2007,...2009, then divide by 4.That is the mean frequency, deaths per year.
223
1824
0 answers