On 11/04/2012 19:33, Křištof Želechovski wrote:
Dnia środa, 11 kwietnia 2012 13:26:43 Prof Brian Ripley pisze:
On 11/04/2012 12:42, Duncan Murdoch wrote:
On 12-04-11 12:43 AM, Křištof Želechovski wrote:
<URL:
http://finzi.psych.upenn.edu/R/library/datasets/html/morley.html>
"The classical data of Michaelson and Morley on the speed of light"
Can you provide more information about the data? How were they
obtained,
etc.? I do not have the book "Genstat Primer" and the nearest location
where
it is available is University of York which is rather far from my
location.
If you can't find the cited reference, I'd try Google. For instance, it
led me to this page
http://en.wikipedia.org/wiki/File:Michelsonmorley-boxplot.svg
which appears to show five series.
Yes, but that is derived from R.
AFAIR the history, Bill Venables got this from Weekes (1986), a book I
have only ever seen in Adelaide. A better reference is
S. M. Stigler (1977) Do robust estimators work with real data?
Annals of Statistics 5, 1055–1098. (See Table 6.)
The data in R are identical with Table 6 but they were not obtained by
Michaelson and Morley; they were obtained by Michelson. The description is
wrong.
It is also a problem in R itself, as evidenced by the following instruction:
data(morley)
Of course, you can name a data set whatever you like, even data(marilyn) would
be all right, but may I suggest that this data set be renamed to michelson?
That is what it is called in package MASS ....
Please fix,
Chris
--
Brian D. Ripley, rip...@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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