[R] c4 for the un-biasing of sample stddev of normal distribution

[James Muller]

Hi list,

I'm trying to track down a function returning (the expected value of) 
c4, for correcting for bias in sample standard deviation, given sample 
standard deviation, population size, and normality of the distribution.

Any help appreciated :) And, apologies if I'm looking past it...

Cheers-

James