No σ for you!

[KeithB]

"True, but page 335 does cover it"

Not in mine it doesn't, no mention of standard deviation at all:

   
And 336 is a discussion of the Add/Drop algorithm and 337 is a discussion of linear regression.

338 starts the discussion of IEEE floating point.

What does it mean by "3. It is easier to use sample means, variances and correlations as inputs in place of the original data"?

(Sorry for the poor image, I was not about to break my reference manual to put it flat on a scanner)