No σ for you!

[rprosperi]

(11-21-2024 06:02 PM)KeithB Wrote:  The HP 71 reference manual seems to assume a lot:

"The sample standard deviation calculation uses n-1 as the denominator where n is the sample size. For information concerning statistical arrays, refer to the "Mathematical Discussion of HP-71 Statistical Arrays", page 334."

page 334 has no discussion of standard deviation, either population or sample.

The owner's manual is not particularly helpful, either.

True, but page 335 does cover it, so more of a dumb editing issue. But your conclusion that these manuals don't cover it very well remains true IMHO, for such a subtle yet important difference, it should be explained better.