Table 7: Variability of results at 20°C (within and between experiments).

Class of treatment SD totalSD withinSD between

All trialsC82.472.261.01
H2O 45× 82.32 ( 6.22 )2.13 ( 5.92 )0.93 ( 7.73 )
As 45× 81.86 ( 24.85 )1.62 ( 28.19 )0.91 ( 9.95 )

Early trialsC42.632.391.08
H2O 45× 42.36 ( 10.28 )2.11 ( 11.79 )1.05 ( 3.24 )
As 45× 41.87 ( 28.78 )1.59 ( 33.76 )0.99 ( 8.27 )

Late trialsC42.262.120.80
H2O 45× 42.28 (+0.81 )2.14 (+1.08 )0.79 ( 1.08 )
As 45× 41.71 ( 24.55 )1.66 ( 21.64 )0.41 ( 49.13 )

C = control;  = number of experiments; SD = standard deviation.