ABSTRACT
In an experiment on the effect of treatments A and B on the amount of substance S in mice’s blood, it was not practicable to use more than 4 mice on any one day. The treatments formed a 2 x 2 system: https://www.niso.org/standards/z39-96/ns/oasis-exchange/table"> A0: A absent, B0: B absent A1: A present, B1: B present The mice used on one day were all of the same sex. The data are given in Table R.1 (Cox, 1958, §7.4).
