[R] sleep data

Martin Maechler maechler at stat.math.ethz.ch
Thu Jan 18 18:13:45 CET 2007

Thank you, Chuck and Tom.

I'd gladly improve the help page,

particularly if you can provide a patch against


where I've already added the Cushny and Peebles reference,
thanks to Chuck.

Martin Maechler, ETH Zurich

>>>>> "ChuckB" == Charles C Berry <cberry at tajo.ucsd.edu>
>>>>>     on Wed, 17 Jan 2007 10:48:13 -0800 writes:

    ChuckB> Yes, you refer to

    ChuckB>  	Cushny, A. R. and Peebles, A. R. The action of
    ChuckB> optical isomers: II hyoscines. The Journal of
    ChuckB> Physiology, 1905, 32: 501.510.

    ChuckB> which was used by 'Student' to illustrate the paired
    ChuckB> t-test.

    ChuckB> This is indeed a crossover design.

    ChuckB> On Wed, 17 Jan 2007, Tom Backer Johnsen wrote:

    >> When reading the documentation for the "sleep" data set
    >> in R, the impression is clear, this is an "independent
    >> groups" kind of design (two groups of 10 subjects each).
    >> However, when browsing the original article (referred to
    >> in the help file), my impression is quite clear, this is
    >> really a "repeated measures" kind of data (one group of
    >> 10 subjects, two observations).  What is correct?
    >> Tom
    >> ______________________________________________
    >> R-help at stat.math.ethz.ch mailing list
    >> https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do
    >> read the posting guide
    >> http://www.R-project.org/posting-guide.html and provide
    >> commented, minimal, self-contained, reproducible code.

    ChuckB> Charles C. Berry (858) 534-2098 Dept of
    ChuckB> Family/Preventive Medicine E
    ChuckB> mailto:cberry at tajo.ucsd.edu UC San Diego
    ChuckB> http://biostat.ucsd.edu/~cberry/ La Jolla, San Diego
    ChuckB> 92093-0901

    ChuckB> ______________________________________________
    ChuckB> R-help at stat.math.ethz.ch mailing list
    ChuckB> https://stat.ethz.ch/mailman/listinfo/r-help PLEASE
    ChuckB> do read the posting guide
    ChuckB> http://www.R-project.org/posting-guide.html and
    ChuckB> provide commented, minimal, self-contained,
    ChuckB> reproducible code.

More information about the R-help mailing list