Sample Variance 1 - Free Download
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WHY DOES THE SAMPLE VARIANCE HAVE N-1 IN THE DENOMINATOR
In Chapter 4 (p. 59), the sample variance of a sample y
1
, y
2
, … , y
n
was defined as
s
2
=
!
!
!!
!
!
!!!
!!!
,
and described as “almost” the mean of the squared deviations
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