Re: The sample s.d. always underestimates

I wrote Posted Jul 8, 2006. 4:53 AM


***Population Mean value is under or overestimated by the Sample Mean. On contrary in what concerns standard deviations (and variances) we have always
____s.d. Sample < = s.d. Population

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Therefore Population ssd >=Sample ssd.
To have the unbiased estimation of the Population variance (sigma the standard deviation) we must to divide the Sample ssd by n-1, to have the estimation of the Population ssd ***

My comment:

Seems Jack so dyslectic as Bob (Reef Fish)

I quote from Jack (YESTERDAY)

***Finally, Afonso, at long last you are starting to understand the differnece between a sample estimate and a parameter. All these hours I thought that I was wasting my time. Jack***

My response

Jack: You are so insolent and stupid as your *alter ego* Bob -Yurra.

____licas (Luis A. Afonso)
.