d_3 {CC} | R Documentation |
range factors
Description
The sample range R
is a biased estimator for the
population standard deviation of R. For a normally distributed sample of
size n
, d_3(n)R
is an unbiased estimator of the
standard deviation of R.
Usage
d_3(n)
Arguments
n |
the sample size |
Value
a numeric value representing the multiplier to render R unbiased for the standard deviation of R
Author(s)
W.J. Braun
References
Montgomery, D.C. (2000) Introduction to Statistical Quality Control, Wiley
See Also
Examples
x <- rnorm(10, sd = 3)
R <- diff(range(x))
d_3(10)*R # expected value of this is (V(R))^{1/2}
[Package CC version 1.0 Index]