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The following data give the worldwide number of fatal airline accidents of commercially scheduled air transports in the years from 1997 to 2005.

Year	1997 1998	1999	2000	2001	2002	2003	2004	2005
Accidents	25 20	21	18	13	13	7	9	18

Find the sample variance of the number of accidents in these years.

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Category:- Statistics and Probability
Reference No.:- M91577062

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