Blood Data of Rencher (1995), Ex. 6.26

In table 6.19, we have a comparison of four regents (Burdick, 1979).
The first reagent is the one presentlyu in use and the other three are less
expensive reagents that we wish to compare with the first.
All four reagents are used with a blood sample from each patient. 
The three variables measured for each reagent are
y1 white blood count
y2 red blood count
y3 haemoglobin


(a) analyze as a randomized block design with subjects as blocks
(b) compare the first reagent with the other three using a contrast.