BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Optimal design of experiments with very low average replication - 
 Bailey\, RA
DTSTART:20110902T123000Z
DTEND:20110902T130000Z
UID:TALK32741@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Trials of new crop varieties usually have very low average rep
 lication.  Thus one possiblity is to have a single plot for each new varie
 ty and several plots for a control variety\, with the latter well spread o
 ut over the field.  A more recent proposal is to ignore the control\, and 
 instead have two plots for each of a small proportion of the new varieties
 .\n\nVariation in the field may be accounted for by a polynomial trend\, b
 y spatial correlation\, or by blocking.   However\, if the experiment has 
 a second phase\, such as making bread from flour milled from the grain pro
 duced in the first phase\, then that second phase usually has blocks.  The
  optimality criterion used is usually the A criterion: the average varianc
 e of the pairwise differences between the new varieties.  I shall compare 
 designs under the A criterion when the average replication is much less th
 an two.\n\n
LOCATION:Seminar Room 1\, Newton Institute
END:VEVENT
END:VCALENDAR