Hi

 mean = 4 

median = 4 

sum of squared deviations = 26

variance = 3.7143



1	4	9

2	4	4

3	4	1

4	4	0

4	4	0

6	4	4

6	4	4

6	4	4

32		26

32/8=4		26/7 = 3.7143





 

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