Hi, Greg:
Thanks very much for the reply.
1. The 'ptukey' and 'qtukey' function are the distribution of the
studentized range, not the range. I tried "sum(ptukey(x, 2, df=Inf,
lower=FALSE))*.1" and got 1.179 vs. 1.128 in the standard table of d2
for n = 2 observations per subgroup.
2. I tried simulation and found that I needed 1e7 or 1e8 random
normal deviates to get the accuracy of the published table.
3. Then I programmed in Excel the integral over seq(-5, 5, .1)
using a correction to the formula I got from Kendall and Stuart and got
the exact numbers in the published table except in one case where it was
off by 1 in the last significant digit.
Thanks again,
Spencer
Greg Snow wrote:
> The "ptukey" and "qtukey" functions may be what you want (or at least in
> the right direction).
>
> You could also easily estimate this by simulation.
>
> Hope this helps,
>
>
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